Select the incorrect statement regarding inbreeding:
1.
Inbreeding helps in elimination of deleterious alleles from the population
2.
Inbreeding is necessary to evolve a pure-line in any animal
3.
Continued inbreeding reduces fertility and leads to inbreeding depression.
4.
Inbreeding depression cannot be overcome by out-crossing.
For a biocontrol agent to be part of an integrated pest management, it should be:
1. species-specific and symbiotic
2. free living and broad spectrum
3. narrow spectrum and symbiotic
4. species-specific and inactive on non-target organisms
The major products C and D formed in the following reaction respectively are:
\(CH_3CH_2CH_2OC{(CH_3)}_3 \xrightarrow[\Delta]{\text{Excess}\ HI}\ C + D\)
1. H3C-CH2-CH2-I and I-C(CH3)3
2. H3C-CH2-CH2-OH and I-C(CH3)3
3. H3C-CH2-CH2-I and HO-C(CH3)3
4. H3C-CH2-CH2-OH and HO-C(CH3)3
Match the following enzymes with their functions:
|
Column-I |
Column-II |
||
|
(a) |
Restriction endonuclease |
(i) |
joins the DNA fragments |
|
(b) |
Exonuclease |
(ii) |
extends primers on genomic DNA template |
|
(c) |
DNA ligase |
(iii) |
cuts DNA at a specific position |
|
(d) |
Tag polymerase |
(iv) |
removes nucleotides from the ends of DNA |
Select the correct option from the following:
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (i) | (iv) | (ii) |
| 2. | (iii) | (iv) | (i) | (ii) |
| 3. | (iv) | (iii) | (i) | (ii) |
| 4. | (ii) | (iv) | (i) | (iii) |
Match the oxide given in column I with its property given in column II:
| Column I | Column II |
| (i) | (a) Neutral |
| (ii) | (b) Basic |
| (iii) | (c) Acidic |
| (iv) | (d) Amphoteric |
Which of the following options is correct?
| (i) | (ii) | (iii) | (iv) | |
| 1. | (b) | (a) | (d) | (c) |
| 2. | (c) | (b) | (a) | (d) |
| 3. | (a) | (d) | (b) | (c) |
| 4. | (b) | (d) | (a) | (c) |
The two antibiotic resistance genes on vector pBR 322 are for:
1. Ampicillin and Tetracycline
2. Ampicillin and Chloramphenicol
3. Chloramphenicol and Tetracycline
4. Tetracycline and Kanamycin
The exploitation of bioresources of a nation by multinational companies without authorization from the concerned country is referred to as:
| 1. | Bioweapon | 2. | Biopiracy |
| 3. | Bioethics | 4. | Biowar |
Carnivorous animals - lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as:
1. Character displacement
2. Altruism
3. Resource partitioning
4. Competitive exclusion
The decline in the population of Indian native fishes due to the introduction of Clarias gariepinus in river Yamuna can be categorised as:
1. Co-extinction
2. Habitat fragmentation
3. Over exploitation
4. Alien species invasion
Match the following RNA polymerases with their transcribed products:
|
Column-I |
Column-II |
||
|
(a) |
RNA polymerase I |
(i) |
tRNA |
|
(b) |
RNA polymerase II |
(ii) |
rRNA |
|
(c) |
RNA polymerase III |
(iii) |
hnRNA |
Select the correct option from the following:
| Options: | (a) | (b) | (c) |
| 1. | i | iii | ii |
| 2. | i | ii | iii |
| 3. | ii | iii | i |
| 4. | iii | ii | i |
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