The unofficial KCET answer key for Biology subject is available to download here. Students who appeared for KCET exam, can check KCET 2024 Biology questions along with answers here. Check latest KCET answer key here.
Latest on April 18, 2024:
KCET Biology Answer Key 2024
KCET Biology 2024 answers along with questions have been tabulated below.
| S. No | Questions | Answers |
|---|---|---|
| 1 | Following representations P, Q and R denote a few steps of Griffith Experiment. Identify the Correct ones:P. R strain → Inject into mice → Mice die XQ. S strain (Heat killed) → Inject into mice — Mice dieR. R strain → Inject into mice → Mice live | R only |
| 2 | In tRNA that region that binds with mRNA is | Anticodon loop of tRNA |
| 3 | The principle of vaccination is based on which property of the immune system | Dryopethicus |
| 4 | Mule is the result of | Interspecific hybridization |
| 5 | Genome HIV replicates in the macrophages with the help of an enzyme called | Reverse Transcriptasee |
| 6 | Read the following statements: Statement I: Morphine is obtained by acetylation of Heroin. Statement II: Cannabinoids are known for their effect on the cardiovascular system | Statement 1 is incorrect and Statement 2 is correct |
| 7 | Which among the following is used to treat Emphysema? (A) Human Hormone – alpha – Antitrypsin (B) Human alpha – Interferon (C) Human protein – alpha -Antitrypsin (D) Human alpha – Lactalbumin | C |
| 8 | Homeostasis is a condition where the organisms (A) Maintain a constant internal environment in everchanging external environment (B) do not maintain a constant internal environment (C) Change their internal environment according to their external environment (D) Change their internal environment when the external environment is constant | A |
| 9 | Which of the following is not a parasitic adaptation? (A) Loss of unnecessary sense organs (B) Absence of adhesive organs or suckers (C) Loss of digestive system (D) High reproductive capacity | B |
| 10 | DNA polymerase of Thermus aquaticus is | Thermostable |
| 11 | If a recombinant DNA bearing gene for resistance to Ampicillin transferred into E.coli cells, host cells become transformed into Ampicillin resistant cells. What happens when these E.coli are grown on medium containing Ampicillin? | Non-transformants will die and transformant will grow |
| 12 | Which of the following based upon the principle of antigen-antibody interaction? | ELISA |
| 13 | A strict protection of biodiversity hotspots could reduce the ongoing mass extinction by almost | 30% |
| 14 | Identify the incorrect match respect to recently extinct animals and their place extinction according to IUCN Red list (A) Dodo-Mauritius (B) Quagga – Africa (C) Thylacine – Australia (D) Steller’s Sea Cow – North America | D |
| 15 | According to the hypothesis proposed by environmental biologists, a relatively constant environment in tropics promotes | Niche specialization and greater species diversity |
| 16 | In the prevention of air pollution, the role of scrubber is to remove | Gaseous SO2 |
| 17 | Match List-I with List-II and choose the correct answer. (Nitrite rich fertilizer, carbon dioxide…….). | B |
| 18 | The mRNA has Untranslated Regions (UTRs) | At both 3′ -end and 5′ -end beyond Terminator codon and before AUG respectively |
| 19 | In Structural gene, the template DNA strand has nucleotide sequences 3′ ATGCATGCATGCATGC 5′ . Find the correct and complimentary nucleotide sequence on coding strand | 5′ TACGTACGTACGTACG 3′ |
| 20 | Read the following statements Statement I : All vertebrates develop a row of vestigial gill slits during embryonic stage. Statement II : Embryos always pass through the adult stages of other animals. | Statement I is correct, Statement II is incorrect |
| 21 | Which of the following exhibits haplodiplontic lifecycle ? | Ectocarpus |
| 22 | Identify, the phylum which shows the following characteristics: | Ctenophora |
| 23 | When a flower has both stamens and carpels it is described as | Bisexual |
| 24 | Ciliated epithelial cells are present in | Bronchioles |
| 25 | Which of the following statements is correct with reference to vacuoles? | It is membrane bound and contains water and excretory substances. |
| 26 | Exoskeleton of Arthropods is made up of unique complex polysaccharide known as | Chitin |
| 27 | The enzyme Recombinase is required at which stage of Meiosis I? | Pachytene |
| 28 | The water potential of pure water is | Zero |
| 29 | . Match the pigments given in List I with their colour in chromatogram given in List II. (Chlorophyll ‘b’, Carotenoids | B |
| 30 | Which is the intermediate compound that links the end product of Glycolysis with TCA Cycle? | Acetyl CoA |
| 31 | . Auxins : Apical dominance : : Gibberellins : | Bolting |
| 32 | The term Uremia refers to | Accumulation of Urea in blood. |
| 33 | The typical ‘lub-dub’ sounds heard during heartbeat are produced due to | Closure of bicuspid and tricuspid valves followed by semilunar valves |
| 34 | The functional unit of contraction is a | Portion of myofibril between two successive Z-lines” |
| 35 | Match the parts of the brain given in List I with their functions given in List II. (Medulla oblongata, Hypothalamus, ……. | D |
| 36 | Hydra reproduces asexually by producing | Buds |
| 37 | When male and female gametes are morphologically distinct, the condition is known as | Heterogametes |
| 38 | The role of Filiform apparatus in synergids is to | Guide the entry of pollen tube |
| 39 | Transfer of pollen grains from the anther to the stigma of another flower of the same plant, is called | Geitonogamy |
| 40 | Which of the following hormones is not secreted by human placenta? | LH |
| 41 | In human females, the endometrium of uterus consists of | Glandular layer |
| 42 | If two primary spermatocytes and two primary oocytes undergo meiosis simultaneously, what will be the ratio of spermatozoa and ova produced at the end of the gametogenesis? | 4:1 |
| 43 | The Government of India legalised MTP with some strict regulations in the year | 1971 |
| 44 | The process in which a small part of the vas deferens is removed or tied up through a small incision, is called | Vasectomy |
| 45 | Test cross in pea plant is | A cross between F2 tall plant and recessive parent. |
| 46 | The genotype ratio of incomplete dominance is | 1:2:1 |
| 47 | Find the incorrect statement among the following: (A) In sex linked recessive traits the gene is transmitted from unaffected carrier female to some of male progeny. (B) Accumulation of phenylpyruvic acid in brain results in mental retardation (C) Individuals affected by Down’s Syndrome will have congenital heart defect and are more intelligent. (D) Turner’s Syndrome is caused due to the absence of one X- chromosome. | C |
| 48 | In a dihybrid cross between a true breeding round yellow seeded and true breeding wrinkled green seeded pea plant, the ratio of segregation of round and wrinkled seed traits in F2 is | 3:1 |
| 49 | Stanley Miller simulated the conditions of pre – biotic earth using spark – discharge apparatus. Which organic compounds were observed by him on analysing the end product of his experiment? | Amino acids |
| 50 | Most ape – like ancestral primate was | Dryopithecus |
| 51 | The principle of vaccination is based on which property of immune system? | Memory |
| 52 | Genome of HIV replicates in the macrophages with the help of an enzyme called | Reverse Transcriptase |
| 53 | Read the following statements: Statement I: Morphine is obtained by acetylation of Heroin. Statement II: Cannabinoids are known for their effect on cardiovascular system Which of the following options is correct with reference to these statements? | C |
| 54 | Identify the bacterial disease among the following: (A) Brown rust of wheat (B) Tobacco mosaic disease (C) Black rot of crucifers (D) Late blight of potato | C |
| 53 | Match the nutrients given in List-I with the source in List-II: (vitamin A, single cell protein) | B |
| 54 | The chemical substances which are produced by some microbes which can kill or retard the growth of other microbes are known as | D |
| 55 | Select the correct statement from the following: | D |
| 56 | Which of these enzymes is required to cleave a plasmid? | B |
| 57 | The natural reservoir of phosphorus is | A |
| 58 | The sequence of communities of primary succession in water is | Phytoplanktons -> Rooted hydrophytes -> Free floating hydrophytes -> Reed swamps -> Marsh meadows -> Scrubs -> Trees. |
| 59 | Match the type of adaptation given in List-I with their examples given in List-II. Select the option showing correct combination (Biochemical adaptation, Behavioural adaptation | 1-q, 2-p, 3-s, 4-r |
| 60 | The annual net primary productivity of the biosphere is approximately | 170 billion tons |
| More to be Added (Keep Checking) |