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Life Processes Class 10 MCQ Study CBSE Students
Photosynthesis occurs in which part of the plant cell?
1. chloroplasts
2. mitochondria
3. cytoplasm
4. nucleus
Option 1 – chloroplasts
Melvin Calvin got Nobel Prize for his studies on carbon : ( Life Processes Class 10 MCQ Study CBSE )
1. light reaction
2. plant hormones
3. carbon fixation
4. photons
Option 3 – carbon fixation
In plants exchange of gases takes place through :
1. stomata
2. palisade Tissue
3. spongy Tissue
4. midrib
Option 1 – stomata
Sinus venous is absent in :
1. man
2. frog
3. salamander
4. fish
Option 1 – man
Open type of circulatory system consists of : ( Life Processes Class 10 MCQ Study CBSE )
1. blood vessels and blood
2. gills and blood
3. auricles and ventricles
4. heart, sinuses and blood
Option 4 – heart, sinuses and blood
White coloured blood occurs in :
1. insects
2. earthworm
3. frog
4. snail
Option 1 – insects
Pericardium is associated with : ( Life Processes Class 10 MCQ Study CBSE )
1. lung
2. kidney
3. heart
4. brain
Option 3 – heart
A four chambered heart occurs in :
1. fishes, birds
2. amphibians, reptiles
3. reptiles, mammals
4. birds, mammals
Option 4 – birds, mammals
Incompletely divided ventricle occurs in :
1. fish
2. frog
3. reptiles
4. birds
Option 3 – reptiles
In man, superior venacava collects blood from : ( Life Processes Class 10 MCQ Study CBSE )
1. right auricle
2. head, legs
3. hands, legs
4. head, neck
Option 4 – head, neck
Venacavae in man, open into :
1. all parts of body
2. left auricle
3. right ventricle
4. left ventricle
Option 1 – all parts of body
The blood vessel that brings oxygenated blood to heart :
1. pulmonary artery
2. post caval vein
3. coronary vein
4. pulmonary vein
Option 4 – pulmonary vein
Heart attack is caused by the blocking of ( Life Processes Class 10 MCQ Study CBSE )
1. pulmonary artery
2. coronary artery
3. coronary vein
4. pulmonary vein
Option 2 – coronary artery
Tricuspid valve is present between :
1. right auricle and left ventricle
2. left auricle and right ventricle
3. left auricle and left ventricle
4. right auricle and right ventricle
Option 4 – right auricle and right ventricle
The valve present between left auricle and left ventricle is : ( Life Processes Class 10 MCQ Study CBSE )
1. mitral
2. tricuspid
3. semilunar
4. pulmonary
Option 1 – mitral
Pulmonary aorta starts from :
1. right ventricle
2. left ventricle
3. right auricle
4. left auricle
Option 1 – right ventricle
Deoxygenated blood from heart is taken to :
1. kidney
2. lung
3. neck
4. stomach
Option 2 – lung
Systemic aorta originates from : ( Life Processes Class 10 MCQ Study CBSE )
1. right ventricle
2. right auricle
3. left auricle
4. left ventricle
Option 4 – left ventricle
Blood pressure of a person is measured by :
1. galvanometer
2. sphygmomanometer
3. barometer
4. thermometer
Option 2 – sphygmomanometer
The number of valves present at the entrance of aorta in left ventricle :
1.2
2.3
3.4
4.5
Option 1 – 2
3 chambered heart occurs in : ( Life Processes Class 10 MCQ Study CBSE )
1. lizard
2. frog
3. crow
4. dog
Option 2 – frog
Caval veins in amphibians from :
1. right auricle
2. left auricle
3. ventricle
4. sinus venous
Option 4 – sinus venous
Ventricle is incompletely divided in : ( Life Processes Class 10 MCQ Study CBSE )
1. crow
2. cat
3. camel
4. lizard
Option 4 – lizard
The substance produced in one part of the body and taken to another part :
1. oxygen
2. phosphorous
3. hormone
4. iodine
Option 3 – hormone
Lymph is a part of :
1. digestive system
2. excretory system
3. nervous system
4. transport system
Option 4 – transport system
Animals without red blood cells : ( Life Processes Class 10 MCQ Study CBSE )
1. frog
2. earthworm
3. snail
4. peacock
Option 2 – earthworm
Sinus venous is associated with :
1. lung
2. kidney
3. stomach
4. heart
Option 4 – heart
Example for open type of circulatory system :
1. amoeba
2. earth worm
3. man
4. butterfly
Option 4 – butterfly
The blood vessel that gathers blood in earth worm is :
1. ventral blood vessel
2. dorsal blood vessel
3. coelomic cavity
4. aorta
Option 2 – dorsal blood vessel
The blood vessel that distributes blood in earth worm is :
1. gills
2. dorsal blood vessel
3. ventral blood vessel
4. lungs
Option 3 – ventral blood vessel
The ventral blood vessel in earthworm is :
1. above alimentary canal
2. above the heart
3. below the lungs
4. below the alimentary canal
Option 4 – below the alimentary canal
In cockroach, the muscles that help in sending the blood into heart :
1. tracheal
2. cardiac
3. alary
4. bronchial
Option 3 – alary
Which of the following is released during photosynthesis?
1. oxygen
2. carbon dioxide
3. light
4. energy
Option 1 – oxygen
Iodine can be used to test the presence of :
1. glucose
2. light
3. starch
4. carbon dioxide
Option 3 – starch
Photosynthetic activity in green plants has to be tested :
1. early in the morning
2. after keeping the plant in dark for 5-6 hours
3. after exposing the plant to light for 2-3 hours
4. in a day any time
Option 3 – after exposing the plant to light for 2-3 hours
Autotrophic organisms
1. Depend on other organisms for food
2. Hunt for the food
3. Synthesize their own food
4. Can not synthesize their food
Option 3 – Synthesize their own food
The process in which energy stored in carbohydrates released is known as :
1. photosynthesis
2. respiration
3. reproduction
4. excretion
Option 2 – respiration
Which of the following is the most important life process :
1. transport
2. excretion
3. photosynthesis
4. nutrition
Option 3 – photosynthesis
In electromagnetic radiation, which of the following has greater wave length than visible light?
1. ultraviolet rays
2. infra red rays
3. cosmic rays
4. x-rays
Option 2 – infra red rays
Birds excrete nitrogenous waste as
(A) uric acid
(B) urea
(C) NH3
(D) guanine
Option a – uric acid
Columns of Bertini in the kidneys of mammals are formed as extensions of
(A) medulla into cortex
(B) cortex into medulla
(C) medulla into pelvis
(D) pelvis into ureter
Option b – cortex into medulla
Which one of the following is the CORRECT description of a certain part of a normal human skeleton?
(A) The parietal bone and the temporal bone of the skull are joined by a fibrous joint.
(B) The first vertebra is the axis, which articulates with the occipital condyles.
(C) The 9th and 10th pairs of ribs are called the floating ribs.
(D) The glenoid cavity is a depression to which the thigh bone articulates.
Option a – The parietal bone and the temporal bone of the skull are joined by a fibrous joint.
Multipolar neurons are with
(A) two axons and two or more dendrites
(B) one axon and one dendrite
(C) one axon and two or more dendrites
(D) many axons and many dendrites
Option c – one axon and two or more dendrites
An action potential in the nerve fiber is produced when positive and negative charges on the outside and the inside of the axon membrane are reversed, because
(A) more potassium ions enter the axon as compared to sodium ions leaving it.
(B) more sodium ions enter the axon as compared to potassium ions leaving it.
(C) all potassium ions leave the axon.
(D) all calcium ions enter the axon.
Option b – more sodium ions enter the axon as compared to potassium ions leaving it.
Identify the structures or regions that are INCORRECTLY paired with their functions.
(A) Hypothalamus: Production of releasing hormones and regulation of temperature, hunger, and thirst.
(B) Limbic system: Consists of fiber tracts that interconnect different regions of the brain; controls movement.
(C) Medulla oblongata: Controls respiration and cardiovascular reflexes.
(D) Corpus callosum: Band of fibers connecting left and right cerebral hemispheres.
Option b – Limbic system: Consists of fiber tracts that interconnect different regions of the brain; controls movement.
Which one of the following hormones is responsible for uterine contraction during parturition?
(A) Relaxin
(B) Vasopressin
(C) Oxytocin
(D) Prolactin
Option c – Oxytocin
Which one of the following hormones also produces anti-inflammatory reactions in man and suppresses the immune response in addition to its primary functions?
(A) Cortisol
(B) Thymosin
(C) Thyrocalcitonin
(D) Erythropoietin
Option a – Cortisol
Low Ca in the body fluid is the cause of
(A) tetany
(B) anemia
(C) angina pectoris
(D) gout
Option a – tetany
Identify the hormone with its CORRECT matching of source and function.
(A) Oxytocin – posterior pituitary, growth, and maintenance of mammary glands
(B) Melatonin – pineal gland, regulates the normal rhythm of the sleep-wake cycle
(C) Progesterone – corpus luteum, stimulation of growth and activities of female secondary sex organs
(D) Atrial natriuretic factor – ventricular wall, increases the blood pressure
Option b – Melatonin – pineal gland, regulates the normal rhythm of the sleep-wake cycle
In a polysaccharide, a number of monosaccharides are linked by
(A) glycosidic bond
(B) peptide bond
(C) hydrogen bond
(D) phosphoester bond
Option a – glycosidic bond
Which of the following is NOT a part of the small intestine?
(A) Duodenum
(B) lleum
(C) Caecum
(D) Jejunum
Option c – Caecum
Intrinsic factor is secreted from
(A) goblet cells
(B) oxyntic cells
(C) argentaffin cells
(D) chief cells
Option b – oxyntic cells
Which one of the following statements is true regarding the digestion and absorption of food in humans?
(A) Oxyntic cells in our stomach secrete the proenzyme pepsinogen.
(B) Fructose and amino acids are absorbed in the large intestine.
(C) Chylomicrons are small lipoprotein particles that are transported from the intestine into blood capillaries.
(D) About 60% of starch is hydrolyzed by salivary amylase in our mouth.
Option c – Chylomicrons are small lipoprotein particles that are transported from the intestine into blood capillaries.
From the following identify the disorder that is NOT associated with the digestive system.
(A) Tetanus
(B) Diarrhoea
(C) Jaundice
(D) Dysentery
Option a – Tetanus
The alternation of generations in Coelenterata is known as
(A) Metamorphosis
(B) Metagenesis
(C) Metamerism
(D) Ecdysis
Option b – Metagenesis
Planaria possesses a high capacity of
(A) metamorphosis
(B) regeneration
(C) alternation of generation
(D) bioluminescence
Option b – regeneration
Ascaris is characterized by
(A) the presence of true coelom and metamerism.
(B) presence of neither true coelom nor metamerism.
(C) absence of true coelom, but the presence of metamerism.
(D) presence of true coelom, but the absence of metamerism.
Option b – presence of neither true coelom nor metamerism
Which one of the following statements is CORRECT?
(A) Roundworms (Aschelminthes) are pseudocoelomates.
(B) Mollusks are acoelomates.
(C) Insects are psuedocoelomates.
(D) Flatworms (Platyhelminthes) are coelomates.
Option a – Roundworms (Aschelminthes) are pseudocoelomates
The ciliated columnar epithelial cells in humans are known to occur in
(A) Eustachian tube and stomach lining
(B) Bronchioles and fallopian tube
(C) Bile duct and oesophagus
(D) Fallopian tube and urethra
Option b – Bronchioles and fallopian tube
Which of the following is agranulocyte?
(A) Basophil
(B) Neutrophil
(C) Lymphocyte
(D) Eosinophil
Option c – Lymphocyte
Bioluminescence is a characteristic feature of
(A) Platyhelminthes
(B) Coelenterata
(C) Ctenophora
(D) Mollusca
Option c – Ctenophora
Which of the following are also known as collar cells?
(A) Choanocytes
(B) Statocysts
(C) Nematocysts
(D) Cnidoblasts
Option a – Choanocytes
During the process of respiration :
1. enzymes are synthesized
2. large number of ATP molecules are utilized
3. organic substances are utilized
4. fats never participate
Option 3 – organic substances are utilized
In anaerobic respiration :
1. glycolysis does not take place
2. water molecule is split
3. oxygen acts as a final electron acceptor
4. ethyl alcohol is the common end product
Option 4 – ethyl alcohol is the common end product
Oxidative phosphorylation is the formation of :
1. ADP during aerobic respiration
2. NADP during anaerobic respiration
3. ATP during aerobic respiration
4. ATP during presence of sun light
Option 3 – ATP during aerobic respiration
Conversion of glucose to pyruvic acid yields a net gain of :
1.2 molecules of ATP
2. 36 molecules of ATP
3. 4 molecules of ATP
4. 38 molecules of ATP
Option 1 – 2 molecules of ATP
Maximum rate of respiration takes place :
1. 10°C -25°C
2.30°C -40°C
3. 60°C-100°C
4. more than 100°C
Option 2 – 30°C -40°C
Respiration differs from combustion in :
1. release of heat all at once
2. release of heat at several stages
3. initial burning of the substance
4. initial supply of oxygen
Option 2 – release of heat at several stages
In one of the following is observed only aerobic respiration :
1. muscles
2. yeast
3. tetanus bacteria
4. germinating seeds
Option 4 – germinating seeds
For the oxidation, carbohydrates should be in the form of :
1. starch
2. cellulose
3. glucose
4. fats
Option 3 – glucose
Cellular respiration takes place in the
1. cytoplasm
2. nucleus
3. chloroplast
4. mitochondria
Option 4 – mitochondria
Respiration takes place in presence of :
1. light
2. chlorophyll
3. optimum temperature
4. moisture
Option 3 – optimum temperature
Single celled organisms take in oxygen from:
1. air
2. soil
3. water
4. both air and water
Option 3 – water
Terrestrial animals take in oxygen from :
1. pond
2. river
3. air
4. sea
Option 3 – air
Respiratory organs in cockroach are :
1. blood vessels
2. mucous glands
3. gills
4. trachea
Option 4 – trachea
Respiration in amoeba occurs by :
1. transpiration
2. osmosis
3. diffusion
4. inhalation
Option 3 – diffusion
Cutaneous respiration occurs in :
1. cockroach
2. salamander
3. crab
4. parrot
Option 2 – salamander
Skin has no respiratory role in :
1. earthworm
2. lizard
3. frog
4. salamander
Option 2 – lizard
Coelomic fluid in earthworm comes out through :
1. mouth
2. dorsal pores
3. pulmonary vein
4. anus
Option 2 – dorsal pores
Amphibious animal
1. leech
2. earthworm
3. frog
4. cockroach
Option 3 – frog
Tracheae are found in :
1. megascolex
2. bony fish
3. salamander
4. butterfly
Option 4 – butterfly
In cockroach, the tracheal system opens to out side through :
1. anus
2. mouth
3. dorsal pores
4. stigmata
Option 4 – stigmata
The energy released in respiration is obtained from
1. Synthesis of carbohydrates
2. Cellular functions
3. Oxidation of glucose
4. Synthesis of proteins
Option 3 – Oxidation of glucose
The energy utilised in photosynthesis is obtained from
1. Sunlight
2. Oxidation of glucose
3. Breakdown of proteins
4. Breakdown of glucose
Option 1 – Sunlight
Oxidative phosphorylation occurs in
1. Chloroplast
2. Mitochondria
3. Cytoplasm
4. Nucleus
Option 2 – Mitochondria
Photophosphorylation occurs in
1. Mitochondria
2. Cytoplasm
3. Chloroplast
4. Nucleus
Option 3 – Chloroplast
Synthesis of new molecules in the cell requires the following energy
1. Mechanical
2. Electrical
3. ATP
4. Heat
Option 3 – ATP
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