The microbial biocontrol agent for butterfly caterpillar is

• Bacillus thuringiensis

• Sacchromyces

• Lactobacillus

• Cyanobacteria

• Cyanobacteria

The first human-like hominid was called

• Homo habilis

• Homo erectus

• Homo sapiens

• Dryopithecus

• Dryopithecus

Oparin and Haldane proposed

• the theory of natural selection

• that migration affects genetic equilibrium

• that mutations caused speciation

• that the first form of life could have come from preexisting non-living organic molecules

• that the first form of life could have come from preexisting non-living organic molecules

Choose the wrong pair

• Divergent evolution – Forelimbs of whales, bats, cheetah and human

• Convergent evolution – Flippers of penguins and dolphins

• Homologous structures – Vertebrate hearts

• Analogous structures – Tendrils of Bougainvillea and Cucurbita

• Analogous structures – Tendrils of Bougainvillea and Cucurbita

The moiety present at the 5' end of ribose sugar in a polynucleotide is

• OH

• CH₂

• Phosphate

• Adenine

• Adenine

$\frac{1}{4}$ TT : $\frac{1}{2}$ Tt : $\frac{1}{4}$ tt is the binomial expansion of

• ${\left(\frac{1}{2} \mathrm{T} + \frac{1}{2} \mathrm{t}\right)}^2$

• ${\left(\frac{1}{4} \mathrm{T} + \frac{1}{4} \mathrm{t}\right)}^2$

• ${\left(\frac{1}{4} \mathrm{T} + \frac{1}{2} \mathrm{t}\right)}^2$

• ${\left(\frac{1}{2} \mathrm{T} + \frac{1}{4} \mathrm{t}\right)}^2$

• ${\left(\frac{1}{2} \mathrm{T} + \frac{1}{4} \mathrm{t}\right)}^2$

An example for codominance

• Eye colour in Drosophila

• Seed shape and colour in pea plants

• ABO blood group in man

• Haemophilia in man

• Haemophilia in man

108.

The nuclear structure observed by Henkings in 50% of the insect sperm after spermatogenesis was

• X body

• Autosome

• Y chromosome

• Nucleolus

• Nucleolus

Physical association of genes on a chromosome is called

• Repulsion

• Linkage

• Aneuploidy

• Duplication

• Duplication

In the double-helical structure of DNA, the pitch of the helix is

• 3.4 nm

• 0.34 nm

• 6.6 nm

• 34 nm

• 34 nm