Class 11 Biology Chapter 1 NEET Questions. We covered all the Class 11 Biology Chapter 1 NEET Questions in this post for free so that you can practice well for the exam.
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Class 11 Biology Chapter 1 NEET Questions for Students
ACTH is a …….. hormone.
(A) hypercalcemic
(B) pituitary
(C) anti-diuretic
(D) Hypothalamic
Option b – pituitary
The portion of the myofibril between two successive ‘Z’ lines is ( Class 11 Biology Chapter 1 NEET Questions )
(A) the central part of the H zone.
(B) considered as the functional unit of contraction.
(C) the elastic fiber called the ‘A’ band.
(D) the part where thick filaments overlap the thin filaments.
Option b – considered as the functional unit of contraction
…….. acts on the melanin-containing cells and regulates pigmentation of the skin.
(A) MSH
(B) FSH
(C) TSH
(D) LH
Option a – MSH
Visceral muscles ( Class 11 Biology Chapter 1 NEET Questions )
(A) are known as the muscles of the heart.
(B) are also known as striated muscles.
(C) activities are under the voluntary control of the nervous system.
(D) are located in the inner walls of the alimentary canal and reproductive tract.
Option d – are located in the inner walls of the alimentary canal and reproductive tract.
Out of the 12 pairs of cranial nerves, …….. pairs remain in the head region.
(A) 5
(B) 7
(C) 10
(D) 11
Option d – 11
Which of the following hormones regulate spermatogenesis? ( Class 11 Biology Chapter 1 NEET Questions )
(A) Vasopressin and LH
(B) LH and TSH
(C) FSH and androgens
(D) oxytocin and FSH
Option c – FSH and androgens
Muscle is a specialized tissue of …….. origin.
(A) mesodermal
(B) ectodermal
(C) endodermal
(D) none of these
Option a – mesodermal
The target organ of the hormone thyrotropin is ( Class 11 Biology Chapter 1 NEET Questions )
(A) the adrenal gland
(B) the thymus gland
(C) the pineal gland
(D) the thyroid gland
Option d – the thyroid gland
The pelvic girdle consists of
(A) two coxal bones
(B) bones of upper limbs
(C) one coxal bone
(D) clavicle and scapula
Option a – two coxal bones
Which of the following is INCORRECT? ( Class 11 Biology Chapter 1 NEET Questions )
(A) The hormone erythropoietin stimulates erythropoiesis.
(B) Gastrin stimulates the synthesis of HCI and pepsinogen.
(C) Gastric inhibitory peptide inhibits gastrin. secretion and decreases peristalsis.
(D) The hormone Erythropoietin is secreted by the duodenum.
Option d – The hormone Erythropoietin is secreted by the duodenum.
Identify the INCORRECT match with respect to the disorders and their symptoms.
(A) Diabetes insipidus Water loss and dehydration
(B) Diabetes mellitus – Loss of glucose through urine and formation of ketone bodies
(C) Addison’s disease – Acute weakness and fatigue
(D) Exophthalmic goiter – Decreased basal metabolic rate and shrinking of the thyroid gland
Option d – Exophthalmic goiter – Decreased basal metabolic rate and shrinking of the thyroid gland
The thymus gland is located ( Class 11 Biology Chapter 1 NEET Questions )
(A) between lungs behind the sternum on the ventral side of the aorta
(B) one at the anterior part of each kidney
(C) is present in the scrotal sac of male individuals
(D) on the back side of the thyroid gland
Option a – between lungs behind the sternum on the ventral side of the aorta
The functioning of this hormone is antagonistic to aldosterone
(A) ANF
(B) glucagon
(C) TCT
(D) PTH
Option a – ANF
Beta cells of islets of Langerhans secrete ( Class 11 Biology Chapter 1 NEET Questions )
(A) thymosin
(B) glucagon
(C) insulin
(D) secretin
Option c – insulin
Which of the following receptor is NOT located in the skin?
(A) Thermoreceptor
(B) Tangoreceptor
(C) Tactile receptor
(D) Statoreceptor
Option d – Statoreceptor
Which of the following is NOT a function of thymosin? ( Class 11 Biology Chapter 1 NEET Questions )
(A) It plays a major role in the differentiation of T lymphocytes.
(B) It promotes the production of antibodies.
(C) It regulates blood calcium levels.
(D) It influences cell-mediated immunity.
Option c – It regulates blood calcium levels.
Myosin filament
(A) are a thin filament and a polymerized protein
(B) lacks an active site for actin
(C) goes back to a relaxed state after releasing ADP and P₁
(D) is made up of a thick globular head with two long arms
Option c – goes back to a relaxed state after releasing ADP and P₁
Which of the following is the function of the parasympathetic nervous system? ( Class 11 Biology Chapter 1 NEET Questions )
(A) Relaxes gall bladder
(B) Decreases urine output
(C) Increases the rate of heartbeat
(D) Stimulates secretion of saliva
Option d – Stimulates secretion of saliva
The hormone which stimulates the conversion of glycogenesis :
(A) androgen
(B) ADH
(C) glucagon
(D) insulin
Option d – insulin
Read the statements and select the correct option. i. Muscle contraction is initiated by a signal sent by the central nervous system (CNS) via a motor neuron. ii. Shortening of the sarcomere is caused due to inwards pulling of Z lines attached to actins. iii. During muscle contraction, the ‘I’ bands retain their length and the ‘A’ bands get reduced.
(A) i, ii and iii are incorrect
(B) i, ii and iii are correct
(C) i i is correct, ii and iii are incorrect
(D) i i and ii are correct and iii is incorrect
Option d – i i and ii are correct and iii is incorrect
Pick out the CORRECT statement. ( Class 11 Biology Chapter 1 NEET Questions )
(A) The tectorial membrane is a thin elastic membrane located in the middle ear.
(B) The organ of Corti is a structure located on the basilar membrane.
(C) Crista ampullaris lacks hair cells.
(D) The membranous labyrinth is surrounded by a fluid called endolymph.
Option b – The organ of Corti is a structure located on the basilar membrane.
Read the following statements and select the correct option. Statement I: Epinephrine is an amino acid derivative. Statement II: Estradiol is a steroid hormone.
(A) Statement I is correct and II is incorrect.
(B) Statement I is incorrect and II is correct.
(C) Both Statements I and II are correct.
(D) Both Statements I and II are incorrect.
Option c – Both Statements I and II are correct.
Assertion: Repeated activation of the muscles during strenuous exercises can cause fatigue. Reason: Anaerobic breakdown of glycogen causes the accumulation of lactic acid in muscles. ( Class 11 Biology Chapter 1 NEET Questions )
(A) Both assertion and reason are true and the reason is the correct explanation of assertion.
(B) Both assertion and reason are true and the reason is not the correct explanation of assertion.
(C) The assertion is true and the reason is false.
(D) Both assertion and reason are false.
Option a – Both assertion and reason are true and the reason is the correct explanation of assertion.
Which of the following nerve does NOT originate from the lateral side of the medulla oblongata?
(A) Vestibulocochlear
(B) Glossopharyngeal
(C) Vagus
(D) Trochlear
Option d – Trochlear
Which one of the following will happen if the medium surrounding the cell has a higher concentration than the cell? ( Class 11 Biology Chapter 1 NEET Questions )
(a) The cell will gain water.
(b) The cell will die.
(c) There will be no change.
(d) The cell will lose water.
Option d – The cell will lose water
Rough endoplasmic reticulum (RER) looks rough under the microscope because of the attachment of which following cell organelles to the surface.
(a) Centrioles.
(b) Plastids.
(c) Lysosomes.
(d) Ribosomes.
Option d – Ribosomes
The increase in length of stems and roots in plants is due to ( Class 11 Biology Chapter 1 NEET Questions )
(a) lateral meristem.
(b) intercalary meristem.
(c) apical meristem.
(d) secondary growth.
Option c – apical meristem
In plant cells, turgidity and rigidity are provided by
(a) ribosomes.
(b) mitochondria.
(c) Golgi apparatus.
(d) Vacuoles full of cell sap.
Option d – Vacuoles full of cell sap
Which of the following is associated with biological nitrogen fixation? ( Class 11 Biology Chapter 1 NEET Questions )
(a) Red algae.
(b) Brown algae.
(c) Green algae.
(d) Blue-green algae.
Option d – Blue-green algae
The by-product of photosynthesis is
(a) CO₂.
(b) O₂.
(c) energy.
(d) sugar.
Option b – O₂
In persons addicted to alcohol, the liver gets damaged because it ( Class 11 Biology Chapter 1 NEET Questions )
(a) has to detoxify the alcohol.
(b) stores an excess of glycon.
(c) is overstimulated to secrete more bile.
(d) accumulates an excess of fats.
Option d – accumulates an excess of fats
Which one of the following statements is correct?
(a) Bacteria contain cytoplasm but viruses do not.
(b) Bacteria contain mitochondria but viruses do not.
(c) Viruses contain mitochondria but bacteria do not.
(d) Viruses have a cell membrane but bacteria do not.
Option a – Bacteria contain cytoplasm but viruses do not
Which one of the following body parts/organs of the human body does not have smooth muscles? ( Class 11 Biology Chapter 1 NEET Questions )
(a) Ureters.
(b) Iris of eye.
(c) Bronchi of lungs.
(d) Biceps.
Option d – Biceps
Marsilea, Fern, and Horse-tail are examples of which one of the following plant groups?
(a) Pteridophyta.
(b) Bryophyta.
(c) Gymnosperms.
(d) Angiosperms.
Option a – Pteridophyta
Which one of the following functions is not carried out by smooth endoplasmic reticulum?
(a) Transport of materials.
(b) Synthesis of lipid.
(c) Synthesis of protein.
(d) Synthesis of steroid hormone.
Option d – Synthesis of steroid hormone
Which one of the following cell organelles mainly functions as a storehouse of digestive enzymes?
(a) Desmosome.
(b) Ribosome.
(c) Lysosome.
(d) Vacuoles.
Option c – Lysosome
Pollens are produced in
(a) Corolla.
(b) Style.
(c) Stigma.
(d) Anther.
Option d – Anther
Which of the following organisms belongs to Coelenterata (Cnidaria)?
(a) Planaria and liver fluke.
(b) Sea urchin and sea cucumber.
(c) Hydra and sea anemone.
(d) Euplectella and sycon.
Option c – Hydra and sea anemone
The bending of the shoot of a plant towards light can be referred to as
(a) photonasty.
(b) positive phototropism.
(c) negative phototropism.
(d) photoperiodism.
Option b – positive phototropism
Food chain is
(a) the relationship between autotrophic organisms.
(b) exchange of genetic material between two organisms.
(c) passage of food (and thus energy) from one organism to another.
(d) modern entrepreneur establishment providing food outlets.
Chlorophyll in photosynthetic prokaryotic bacteria is associated with
(a) plastids.
(b) membranous vesicles.
(c) nucleoids.
(d) chromosomes.
Option b – membranous vesicles
Consider the following techniques/phenomena: 1. Budding and grafting in fruit plants 2. Cytoplasmic male sterility 3. Gene silencing Which of the above is\are used to create transgenic crops?
(a) 1 only
(b) 2 and 3
(c) 1 and 3 only
(d) None
Option b – 2 and 3
There is some concern regarding the nanoparticles of some chemical elements that are used by the industry in the manufacture of various products. Why? 1. They can accumulate in the environment, and contaminate water and soil. 2. They can enter the food chains. 3. They can trigger the production of free radicals. Select the correct answer using the code given below.
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Option d – 1, 2 and 3
What are the reasons for the people’s resistance to the introduction of Bt brinjal in India? 1. Bt brinjal has been created by inserting a gene from a soil fungus into its genome. 2. The seeds of Bt brinjal are terminator seeds and therefore, the farmers have to buy the seeds before every season from the seed companies. 3. There is an apprehension that the consumption of Bt brinjal may have an adverse impact on health. 4. There is some concern that the introduction of Bt brinjal may have an adverse effect on biodiversity. Select the correct answer using the codes given below :
(a) 1, 2, and 3 only
(b) 2 and 3 only
(c) 3 and 4 only
(d) 1, 2, 3 and 4
Option c – 3 and 4 only
Other than resistance to pests, what are the prospects for which genetically engineered plants have been created? 1. To enable them to withstand drought 2. To increase the nutritive value of the produce 3. To enable them to grow and do photosynthesis in spaceships and space stations 4. To increase their shelf life Select the correct answer using the codes given below :
(a) 1 and 2 only
(b) 3 and 4 only
(c) 1, 2, and 4 only
(d) 1, 2, 3 and 4
Option c – 1, 2, and 4 only
Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to 1. resist drought and increase absorptive area 2. tolerate extremes of pH 3. resist disease infestation Select the correct answer using the codes given below.
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Option d – 1, 2 and 3
Recombinant DNA technology (Genetic Engineering) allows genes to be transferred 1. across different species of plants 2. from animals to plants 3. from microorganisms to higher organisms Select the correct answer using the codes given below.
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Option d – 1, 2 and 3
Which one of the following is the landmark performance of Dr. V. Mohan Reddy, an Indian, born doctor working in the U.S.A. during February 2005?
(a) Research on human stem cells is likely to revolutionize the treatment of deadly diseases like cancer.
(b) A successful open heart procedure called arterial switch is performed on an infant.
(c) Research on genetic engineering can help in the treatment of deadly diseases like AIDS.
(d) Successful brain surgery to revive the function of the nearly dead brain of a prematurely born infant.
Option b – A successful open heart procedure called arterial switch is performed on an infant
Consider the following statements: 1. ELISA test is employed as the first and most basic test for an individual to detect cancer. 2. Almost 50 percent of human beings have Rh blood while the remaining have Rh- blood. Which of the statements given above is/ are correct?
(a) I only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Option d – Neither 1 nor 2
Genetically modified “golden rice” has been engineered to meet human nutritional requirements. Which one of the following statements best qualifies golden rice?
(a) The grains have been fortified with genes to provide three times higher grain yield per acre than other high-yielding varieties
(b) Its grains contain pro-vitamin A which upon ingestion is converted to vitamin A in the human body
(c) Its modified genes cause the synthesis of all the nine essential amino acids
(d) Its modified genes cause the fortification of its grains with vitamin D
Option b – Its grains contain pro-vitamin A which upon ingestion is converted to vitamin A in the human body
Recently, “oil zapper” was in the news. What is it?
(a) It is an eco-friendly technology for the remediation of oily sludge and oil spills
(b) It is the latest technology developed for undersea oil exploration
(c) It is a genetically engineered high biofuel-yielding maize variety
(d) It is the latest technology to control the accidentally caused flames from oil wells.
Option a – It is an eco-friendly technology for the remediation of oily sludge and oil spills
With reference to ‘stem cells, frequently in the news which of the following statements is/are correct? 1. Stem cells can be derived from mammals only. 2. Stem cells can be used for screening new drugs. 3. Stem cells can be used for medical therapies. Select the correct answer using the codes given below:
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
Option b – 2 and 3 only
Two bacteria found to be very useful in genetic engineering experiments are
(a) Escherichia and Agrobacterium
(b) Nitrobacter and Azotobacter
(c) Rhizobium and Diplococcus
(d) Nitrosomonas and Klebsiella
Option a – Escherichia and Agrobacterium
With reference to the recent developments in science which one of the following statements is not correct?
(a) Functional chromosomes can be created by joining segments of DNA taken from cells of different species.
(b) Pieces of artificial functional DNA can be created in laboratories.
(c) A piece of DNA taken out from an animal cell can be made to replicate outside a living cell in a laboratory.
(d) Cells taken out from plants and animals can be made to undergo cell division in laboratory Petri dishes.
Option a – Functional chromosomes can be created by joining segments of DNA taken from cells of different species
Given: 1. Blood cells 2. Bone cells 3. Hair strands 4. Saliva Samples were taken for DNA testing in a criminal investigation. can be
(a) 1, 2, and 3 only
(b) 1 and 4 only
(c) 2 and 3 only
(d) 1, 2, 3, and 4 only
Option d – 1, 2, 3, and 4 only
‘RNA interference (RNA-i)’ technology has gained popularity in the last few years. why? 1. It is used in developing gene silencing therapies. 2. It can be used in developing therapies for the treatment of cancer. 3. It can be used to develop hormone replacement therapies. 4. It can be used to produce crop plants that are resistant to virtual pathogens. Select the correct answer using the code given below.
(a) 1, 2 and 4
(b) 2 and 3
(c) 1 and 3
(d) 1 and 4 only
Option a – 1, 2 and 4
Consider the following statements: Assertion (A): Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules. Reason (R): DNA fragments can be manipulated from restriction endonucleases and DNA ligases. Codes :
(a) Both A and R are true and R is the correct explanation of A
. (b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Option a – Both A and R are true and R is the correct explanation of A
Consider the following statements: Assertion (A): ‘DNA fingerprinting’ has become a powerful tool to establish the paternity and identity of criminals in rape and assault cases. Reason (R): Trace evidence, such as hairs, saliva, and dried semen, are adequate for DNA analysis. Codes :
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Option a – Both A and R are true and R is the correct explanation of A
Which of the following professional(s) are more likely to run the risk of a permanent change in their cell’s DNA? 1. Researchers using Carbon 14 isotope 2. X-ray technician 3. Coal miner 4. Dyer and painter Select the correct answer by using the codes given below Codes :
(a) 2 alone
(b) 1, 2 and 3
(c) 1, 2 and 4
(d) 1, 3 and 4
Option c – 1, 2 and 4
Assertion (A): Insect-resistant transgenic cotton has been produced by inserting the Bt gene. Reason (R): The Bt gene is derived from a bacterium.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Option b – Both A and R are true but R is not a correct explanation of A
Assertion (A): Dolly was the first cloned mammal. Reason (R): Dolly was produced by in vitro fertilization. ( NEET Biology Full Syllabus Test )
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Option d – A is false but R is true
Assertion (A): “DNA fingerprinting” has become a powerful tool to establish the paternity and identity of criminals in rape and assault cases. Reason (R): Trace evidence such as hairs, saliva, and dried semen are adequate for DNA analysis. Codes : ( NEET Biology Full Syllabus Test )
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Option a – Both A and R are true and R is the correct explanation of A
With reference to the latest developments in stem cell research, consider the following statements 1. The only source of human stem cells is the embryos at the blastocyst stage. 2. The stem cells caisining can be derived without destruction to blastocysts. 3. The stem cells themselves in vitro can regenerate virtually forever. 4. Indian cell research centers also created line types that be developed into many can tissues. Which of these statements is correct?
(a) 1, 2 and 4
(b) 1, 2 and 3
(c) 1, 2 and 4
(d) 3 and 4
Option d – 3 and 4
With reference to the Genetically Modified mustard (GM mustard) developed in India, consider the following statements: 1. GM mustard has the genes of a soil bacterium that give the plant the property of pest-resistance to a wide variety of pests. 2. GM mustard has the genes that allow plant cross-pollination and hybridization. 3. GM mustard has been developed jointly by the IARI and Punjab Agricultural University. Which of the statements given above is/are correct?
(a) 1 and 3 only
(b) 2 only
(c) 2 and 3 only
(d) 1, 2 and 3
Option b – 2 only
With reference to the use of nano-technology in the health sector, which of the following statements is/are correct? 1. Targeted drug delivery is made possible by nanotechnology. 2. Nanotechnology can largely contribute to gene therapy. Select the correct answer using the code given below.
(a) 1 only
(b) 2 Only
(c) Both 1 and 2
(d) Neither 1 nor 2
Option c – Both 1 and 2
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