Kvpy

Meiosis-I and meiosis-II are characterised by the separation of

(a) homologous chromosomes; sister chromatids

(b) sister chromatids; homologous chromosomes

(c) centromere; telomere

(d) telomere; centromere

Fruit and leaf drop at early stages can be prevented by the application of 

(a) cytokinins 

(b) ethylene 

(c) auxins 

(d) gibberellic acid

Let S = {1, 2, 3, …., 40) and let A be a subset of S such that no two elements in A have their sum divisible by 5. What is the maximum number of elements possible in A?

(a) 10

(b) 13

(c) 17

(d) 20

A desert lizard (an ectotherm) and a mouse (an endotherm) are placed inside a chamber at 15ºC and their body temperature [T(L) for the lizard and T(M) for the mouse] and metabolic rates [M(L) for the lizard and M(M) for the mouse] are monitored. Which one of the following is correct –

(A)  T(L) and M(L) will fall while T(M) and M(M) will increase

(B)  T(L) and M(L) will increase while T(M) and M(M) will fall

(C)  T(L) and M(L) will fall, T(M) will remain same and M(M) will increase

(D)  T(L) and M(L) will remain same and T(M) and M(M) will decrease 

Methane is greenhouse gas because –

(A)  it absorbs longer wavelengths of the electromagnetic spectrum while transmitting shorter wavelengths.

(B) it absorbs shorter wavelengths of the electromagnetic spectrum while transmitting longer wavelengths

(C) it absorbs all wavelengths of the electromagnetic spectrum

(D) it transmits all wavelengths of the electromagnetic spectrum

The intensity of sound during the festival season increased by 100 times. This could imply a decibel level rise from – 

(A)  20 to 120 dB

(B)  70 to 72 dB

(C)  100 to 10000 dB

(D)  80 to 100 dB 

Codon degeneracy means that

(a) several amino acids are coded by more than one codon

(b) one codon can code for many amino acids

(c) one amino acid can be coded by only one codon

(d) the codons are triplet nucleotide sequences

A pathogen which cannot be cultured in an artificial medium is

(a) protozoan

(b) virus

(c) bacterium

(d) fungus

At which phase of the cell cycle, DNA polymerase activity is at its highest?

(a) Gap 1 (G₁)

(b) Mitotic (M)

(c) Synthetic (S)

(d) Gap 2 (G₂)

During meiosis, there is

(a) one round of DNA replication and one division

(b) two rounds of DNA replication and one division

(c) two rounds of DNA replication and two divisions

(d) one round of DNA replication and two divisions