Srijan ICSE Biology Class 9 Solutions. We covered all the Srijan ICSE Biology Class 9 Solutions in this post for free so that you can practice well for the exam.
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Srijan ICSE Biology Class 9 Objective with Solutions for Students
Altitude sickness is caused at high altitude due to:
(a) high partial pressure of oxygen.
(b) the low partial pressure of oxygen.
(c) low level of hemoglobin.
(d) high partial pressure of carbon dioxide.
Option b – the low partial pressure of oxygen
The elemental composition of an adult human body by mass is:
(a) C>O>H>N.
(b) O>C>H>N.
(c) N>C>H>O.
(d) N>C>O>H.
Option b – O>C>H>N
Which one of the following is considered as ‘good cholesterol’ with reference to individuals facing the risk of cardiovascular diseases and hypertension?
(a) High Density Lipoprotein (HDL).
(b) Low-density lipoprotein (LDL).
(c) Triglyceride.
(d) Fatty acids.
Option a – High Density Lipoprotein (HDL)
Plants contain a variety of sterols like stigmasterol, ergosterol, sitosterol, etc., which very closely resemble cholesterol. These plant sterols are referred to as:
(a) Phytosterols.
(b) Calciferols.
(c) Ergocalciferols.
(d) Lumisterols.
Option a – Phytosterols
Penicillin inhibits the synthesis of bacterial:
(a) cell wall
(b) protein
(c) RNA
(d) DNA
Option a – cell wall
Cobalt is associated with:
(a) growth hormone
(b) vitamin-B12
(c) hemoglobin
(d) intestinal enzymes
Option b – vitamin-B12
Measles is a disease caused by:
(a) bacteria
(b) virus
(c) protozoa
(d) worm
Option c – virus
Neutrophils and lymphocytes originate from:
(a) kidney tubule
(b) spleen
(c) bone marrow
(d) lymph node
Option c – bone marrow
In the human digestive system, the process of digestion starts in:
(a) Oesophagus
(b) Buccal cavity
(c) Duodenum
(d) Stomach
Option b – Buccal cavity
Pulses are obtained from the family:
(a) Fungi
(b) Liliaceae
(c) Cycadaceae
(d) Leguminosae
Option d – Leguminosae
Which one of the following is the infective stage of the malarial parasite?
(a) trophozoite
(b) sporoblast
(c) schizozoite
(d) sporozoite
Option d – sporozoite
‘Lub-dup’ sound is produced due to the action of:
(a) large intestine
(b) lungs
(c) heart
(d) oesophagus
Option c – heart
Muscle fatigue is due to the accumulation of:
(a) cholesterol
(b) lactic acid
(c) lipoic acid
(d) triglycerides
Option b – lactic acid
Which one among the following is a micronutrient present in soil for various crops?
(a) Calcium
(b) Manganese
(c) Magnesium
(d) Potassium
Option b – Manganese
Which one of the following diseases in humans can spread through the air?
(a) Dengue
(b) Tuberculosis
(c) HIV-AIDS
(d) Goitre
Option b – Tuberculosis
Which one among the following structures or cells is not present in connective tissues?
(a) Chondrocytes
(b) Axon
(c) Collagen fiber
(d) Lymphocytes
Option b – Axon
The term “Species” is coined by
1. Linnaeus
2. John Ray
3. Aristotle
4. None
Option 2 – John Ray
Homo sapiens is the scientific name for
1. Monkeys
2. Horses
3. Mans
4. Dogs
Option 3 – Mans
The fungus among the following is
1. Toadstools
2. Mushroom
3. Slime moulds
4. All
Option 4 – All
Doctor of first century AD in India who described plants and animals is
1. Dhanwantari
2. Charaka
3. Sushruta
4. None
Option 2 – Charaka
Roundworm belong to
1. Annelida
2. Protozoa
3. Nematoda
4. All
Option 3 – Nematoda
Mosses and Liverworts belong to
1. Angiosperms
2. Bryophytes
3. Gymno sperms
4. All
Option 2 – Bryophytes
Hydra is a
1. Protozoan
2. Coelenterate
3. Both
4. None
Option 2 – Coelenterate
The scientist who introduced the Binomial system of nomenclature
1. John Ray
2. Aristotle
3. Linneaus
4. None
Option 3 – Linneaus
First taxonomist is
1. John Ray
2. Aristotle
3. Linneaus
4. None
Option 2 – Aristotle
Who introduced microscope in biology?
1. Aristotle
2. Harvey
3. Pasteur
4. Leeuwenhock
Option 4 – Leeuwenhock
Who discovered vaccine for anthrox disease in sheep?
1. Leeuwenhock
2. Lamark
3. Pasteur
4. Harvey
Option 3 – Pasteur
Who was given Nobel Prize for work on Malaria?
1. Leeuwenhock
2. Pasteur
3. Harvey
4. Ronald Ross
Option 4 – Ronald Ross
Where did Mr Ronald Ross carry his work on Malaria?
1. Bangalore
2. New Delhi
3. Madrid
4. Hyderabad
Option 4 – Hyderabad
Pasterurisation is a method for preserving
1. Eggs
2. Meat
3. Milk
4. Fruits
Option 3 – Milk
Antibiotics kill
1. Bacteria
2. Moss
3. Animals
4. Plants
Option 1 – Bacteria
The term biology was first used by
1. Aristotle
2. Lamarck
3. Columbus
4. Devries
Option 4 – Devries
Who is considered as the father of biology?
1. Leeqwenhock
2. Harvey
3. Aristotle
4. Devries
Option 3 – Aristotle
Aristotle started ……… into biology.
1. Careful observation into biology
2. Inductive method into biology
3. Scientific method of inquiry into biology
4. Deductive method of inquiry into biology
Option 3 – Scientific method of inquiry into biology
Which of the following is TRUE with respect to transcription and translation in bacteria?
(A) mRNA requires to undergo processing and maturation before becoming active.
(B) Transcription and translation take place in separate cell compartments.
(C) Translation can begin before the mRNA is fully transcribed.
(D) Transcription and translation cannot be coupled.
Option c – Translation can begin before the mRNA is fully transcribed.
Which is the predominant site for the control of gene expression in prokaryotes?
(A) Transport of mRNA from the nucleus to the cytoplasm
(B) Formation of the primary transcript
(C) Regulation of splicing
(D) Control of the rate of transcriptional initiation
Option d – Control of the rate of transcriptional initiation
…….. proposed the scheme for DNA replication.
(A) Mussels on and Stahl
(B) Watson and Crick
(C) Hershey and Chase
(D) Frederick Griffith
Option b – Watson and Crick
Negatively charged DNA is wrapped around a positively charged histone complex, forming
(A) deoxyribonucleic acid
(B) histone octamer
(C) nucleosome
(D) nucleoid
Option c – nucleosome
Read the following statements and choose the correct option. Statement I: E. coli infected with 32P labeled bacteriophages, were radioactive, indicating DNA is passed from virus to bacteria. Statement II: RNA is the genetic material of the Tobacco Mosaic Virus and QB bacteriophage.
(A) Statement I is correct and statement II is incorrect.
(B) Statement II is correct and statement I is incorrect.
(C) Both statement I and statement II are correct.
(D) Both statement I and statement II are incorrect.
Option c – Both statement I and statement II are correct.
Which of the following is NOT an essential criterion of a molecule that acts as genetic material?
(A) It should be chemically and structurally stable.
(B) It should be able to undergo replication.
(C) It should be capable of undergoing changes required for evolution.
(D) It should be composed of complementary and antiparallel strands.
Option d – It should be composed of complementary and antiparallel strands
Which of the following is NOT a region in the transcription unit of DNA?
(A) Terminator
(B) Sigma factor
(C) Promoter
(D) Structural gene
Option b – Sigma factor
During DNA replication, the discontinuously synthesized fragments are joined by
(A) Helicase
(B) Ligase
(C) Transacetylase
(D) RNA polymerase
Option b – Ligase
The unequivocal proof that DNA is genetic material came from the experiments of
(A) Friedrich Meischer
(B) Alfred Hershey and Martha Chase
(C) Frederick Griffith
(D) Oswald Avery. Colin Macleod and Maclyn McCarty
Option b – Alfred Hershey and Martha Chase
……. DNA is a small stretch of DNA repeated many times, which forms small peaks after undergoing density gradient centrifugation.
(A) Repetitive
(B) Satellite
(C) Bulk
(D) Both (B) and (C)
Option b – Satellite
Which of the following is NOT a stop codon?
(A) UAA
(B) UUA
(C) UAG
(D) UGA
Option b – UUA
Allelic sequence variation in a population with a frequency greater than 0.01 is known as
(A) DNA polymorphism
(B) VNTR
(C) repetitive DNA
(D) satellite DNA
Option a – DNA polymorphism
…….. acts as an inducer for lac operon.
(A) Glucose
(B) Lactose
(C) Galactose
(D) Fructose
Option b – Lactose
Read the following statements and choose the correct option. Statement I: Template strand of the DNA in the structural gene of a transcription unit has 5′-3′ polarity. Statement II: The template strand is used as a reference to define the transcription unit.
(A) Statement I is correct and statement II is incorrect.
(B) Statement II is correct and statement I is incorrect.
(C) Both statement I and statement II are correct.
(D) Both statement I and statement II are incorrect.
Option d – Both statement I and statement II are incorrect.
Which of the following is NOT required for the initiation of translation?
(A) Start codon
(B) p factor
(C) Initiator tRNA
(D) Both (B) and (C)
Option b – p factor
Which of the following is CORRECT with respect to the Variable Number of Tandem Repeats (VNTR)?
(A) They belong to the category of mini satellites.
(B) The copy number of the sequences varies from chromosome to chromosome in an individual.
(C) The size of VNTR varies from 0.1 to 20 kb.
(D) All of the above
Option d – All of the above
Which of the following enzyme fragments DNA?
(A) RNase
(B) DNA Ligase
(C) DNA polymerase
(D) Restriction endonuclease
Option d – Restriction endonuclease
Which of the following flanks the 5′ end of a translational unit of mRNA?
(A) Start codon
(B) Stop codon
(C) UTR
(D) Release Factor
Option a – Start codon
……… was the last of the 24 human chromosomes to be sequenced.
(A) Chromosome 5
(B) Chromosome 24
(C) Chromosome 1
(D) Chromosome 22
Option c – Chromosome 1
Which of the following is NOT a methodology used in the human genome project?
(A) Sequence annotation
(B) Identification of ESTS
(C) DNA fragmentation
(D) DNA fingerprinting
Option d – DNA fingerprinting
Semi-dwarf varieties of rice were derived from
(A) IR-8 and Taichung Native-1
(B) Sonalika and Kalyan Sona
(C) IR-8 and Atlas-66
(D) Jaya and Ratna
Option a – IR-8 and Taichung Native-1
Which of the following steps of polymerase chain reaction requires the highest temperature?
(A) Polymerisation
(B) Annealing
(C) Denaturation
(D) Extension
Option c – Denaturation
What is the basis for adopting RNA interference in developing disease-resistant plants?
(A) It prevents the process of transcription.
(B) It prevents the process of translation of mRNA.
(C) It prevents the process of replication of DNA.
(D) It prevents the process of splicing of hnRNA.
Option a – It prevents the process of transcription.
Large holes in Swiss cheese are formed due to fermentation by
(A) Saccharomyces cerevisiae
(B) Trichoderma polypore
(C) Propionibacterium shermanii
(D) Penicillium notatum
Option c – Propionibacterium shermanii
Which of the following technique is used for the formation of pomato?
(A) Micropropagation
(B) Somatic hybridization
(C) Biofortification
(D) Mutation breeding
Option b – Somatic hybridization
Which of the following is INCORRECT with respect to Multiple Ovulation Embryo Transfer Technology (MOET)?
(A) Cow-in administered hormones to induce follicular maturation.
(B) Instead of one egg/cycle, they yield 8-32 eggs /cycle.
(C) The animal may be mated with an elite bull.
(D) The animal may be artificially inseminated.
Option b – Instead of one egg/cycle, they yield 8-32 eggs /cycle.
Foreign DNA is introduced into the host bacterium by which of the following processes?
(A) Transfection
(B) Transduction
(C) Transformation
(D) Translation
Option c – Transformation
The toxin produced by B. thuringiensis kills insect pests by which of the following mechanisms?
(A) Inhibition of protein synthesis.
(B) RNA interference
(C) Formation of pores in the midgut epithelial cells of insects.
(D) Obstruction of the essential biosynthetic pathway of insects.
Option c – Formation of pores in the midgut epithelial cells of insects.
………. is referred to as the main enzyme of DNA replication.
(A) RNA-dependent DNA polymerase
(B) RNA-dependent RNA polymerase
(C) DNA-dependent DNA polymerase
(D) DNA-dependent RNA polymerase
Option c – DNA-dependent DNA polymerase
Read the following statements and choose the correct option. Statement I: Replication of DNA in eukaryotes occurs in the S-phase of the cell cycle. Statement II: Failure in cell division after replication results in polyploidy.
(A) Statement I is correct and statement II is incorrect.
(B) Statement II is correct and statement I is incorrect.
(C) Both statement I and statement II are correct.
(D) Both statement I and statement II are incorrect.
Option c – Both statement I and statement II are correct.
Which of the following is INCORRECT with respect to the S strain of Streptococcus pneumoniae?
(A) They have a polysaccharide coat.
(B) They produce smooth shiny colonies.
(C) They are avirulent strains of the bacteria.
(D) Mice infected with S strain bacteria die of pneumonia.
Option c – They are avirulent strains of the bacteria.
Which of the following is INCORRECT with respect to RNA?
(A) It acts as the genetic material of QB bacteriophage.
(B) It functions as a messenger and adapter molecule.
(C) It was proved to be the genetic material by experiments performed using bacteriophages by Hershey and Chase.
(D) It is catalytic and reactive in nature.
Option c – It was proved to be the genetic material by experiments performed using bacteriophages by Hershey and Chase.
Identify the CORRECT match.
(A) Himgiri – Leaf curl
(B) Pusa Swarnim – Bacterial blight
(C) Pusa Komal – White rust
(D) Pusa Shubhra – Black rot
Option d – Pusa Shubhra – Black rot
Which of the following statement would be TRUE if after carrying out recombination using the E. coli cloning vector pBR322, the bacterial colonies grow on both ampicillin and tetracycline-containing medium?
(A) The foreign DNA was inserted at BamH I
(B) The foreign DNA was inserted at Pst I
(C) The foreign DNA was inserted at Sal I
(D) No recombination took place
Option d – No recombination took place
Which of the following was used to prevent infestation of tobacco plants by the nematode Meloidogyne incognitid?
(A) Toxic insecticidal proteins
(B) RNA interference
(C) Biolistics
(D) Specific Bt toxin genes
Option b – RNA interference
…….. is used in detergent formulations, to remove oily stains from laundry.
(A) Catalase
(B) Lipase
(C) Ligase
(D) Protease
Option b – Lipase
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