KCET 2018 Previous Year Question Paper for Biology

KCET Biology

Biology CET Question Paper is written below.

Q1. The Frequency of the Allele a Is 0.6, and the Frequency of the Allele a Is 0.4 at a Specific Locus. Find Out the Frequency of Heterozygotes in Unsystematic Mating Inhabitants at Equilibrium?

Ans: According to the question, we determine that a gene contains two alleles, the first one is 'A' (dominant), and the second one is 'a' (recessive) in a stable population. 

We need to assume that the frequency of 'A' is p and the frequency of 'a' is q, then the frequencies of the three possible genotypes will be AA, Aa, and aa. These three genotypes can be articulated by the Hardy-Weinberg equation.

Hardy-Weinberg equation: p2 + 2pq + q2 = 1

Here,

p2 is the frequency of A individuals; otherwise the  homozygous dominant

q2 is the frequency of aa  individuals; otherwise the homozygous recessive

2pq is the frequency of Aa  individuals; otherwise the heterozygous

Here, 

q = 0.4 and p = 0.6 

Therefore, frequency of heterozygote, 2pq = 2 × 0.6 × 0.4 = 0.48

Q2. What Will Happen During the Replication of Retrovirus?

(A) Viral RNA is presented into the host cell.

(B) Viral protein is presented in the host cell.

(C) Transcriptase enzyme is presented into the host cell,

(D) Viral ONA is presented into the host cell.

Ans: B

Into the host cell, the viral RNA is presented which later goes through reverse transcription. As per the explanation, the right answer is 'Viral RNA is introduced in the host cell.'

Q3. in Malignant Tumours, There Is a Very Rapid Division of Cells & Move to Distant Parts of the Body, Thereby Causing New Tumours. This Property Is Called:

(A) Teratogenesis 

(B) Metastasis

(C) Mitosis 

(D) Metagenesis 

Ans: (B)

A category of cancer known as Metastatic cancer which spreads from its site of origin to another part of the body. That is why the precise reply is '(B) Metastasis'.

2018 KCET Answer Key 

KCET 2018 Official Answer Key is given below.

Q1. How Could We Silence a Specific mRNA Translation? Choose the Right Option.

(A) Microinjection 

(B) Antisense RNA

(C) RNA interference technique

(D) Both (B) and (C)

Ans: (D)

Let’s know about the Antisense RNA. It is a single beached oligonucleotide complementary to a protein-coding mRNA. Antisense RNA processes a ‘ds’ structure with the mRNA. 

That is why it is blocking the process of translation. The technique of RNA interference quiets the targeted mRNA molecule consuming a ‘ds’ RNA. That is why the correct response is 'Both (A) and (B)'

Q2. Can You Identify the Right Steps In DNA fingerprinting Techniques That Are Labelled VNTR probes Used? 

(A) Throughout digestion of DNA by REN

(B) Throughout isolation of DNA

(C) Throughout hybridization

(D) Throughout electrophoresis

Ans: In DNA fingerprinting, researchers are using the VNTR, when the ssDNA is hybridized with a probe. That is why the right choice is (C) Throughout hybridization.

Download KCET Biology PYQP PDF

Interested students can download the previous year Biology question paper of 2018 based upon the KCET pattern in the PDF format from our website. The link is given below.

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