Biology GK · all questions

Gentics and Evoloution
practice.

Practice every MCQ with options. Use Show answers when you want the correct option and solution.

517

Questions

10/26

Page

Pick an option on a question to see the right answer and solution.

Q181

The process of DNA chain elongation is mediated chiefly by an enzyme known as

Select an option to see the answer and solution.

Q182

Polyploidy never occurs in which of the following groups of plants?

Select an option to see the answer and solution.

Q183

Consider the following statements regarding 'Germplasm theory' and choose the correct answer:
1. Somatoplasm produces only body cells while germplasm produces reproductive cells
2. Somatoplasm is continous generations after generations while germplasm is discontinuous
3. The germplasm is not influenced by any change in the somatoplasm
4. Germplasm, through reproduction, gives rise to offspring in which again germplasm develops and remains secluded from the somatoplasm

Select an option to see the answer and solution.

Q184

The subspecies at the two ends of a chain, however, may be so different that they cannot interbreed and such a series of geographically distributed subspecies is called a

Select an option to see the answer and solution.

Q185

Genetic drift operates in

Select an option to see the answer and solution.

Q186

From the evolutionary point of view, which one among the following is the most primitive animal?

Select an option to see the answer and solution.

Q187

Who is the father of modern genetics?

Select an option to see the answer and solution.

Q188

The most suitable source of biofertilizer is achieved by the use of

Select an option to see the answer and solution.

Q189

Which of the following methods makes it possible to insert a gene at specific sites in the T-region of a Ti-plasmid that has all its normal properties of transfer and T-DNA insertion and maintenance of the state of integration?

Select an option to see the answer and solution.

Q190

Which of the following is an example of free living nitrogen fixing bacteria?

Select an option to see the answer and solution.

Q191

Some plasmids exist in only a very few copies per cell which are said to be

Select an option to see the answer and solution.

Q192

Three of the 64 amino acid codons do not specify any tRNA and hence are called

Select an option to see the answer and solution.

Q193

Parasexual means of recombining somatic nuclei is found in

Select an option to see the answer and solution.

Q194

Assertion (A) Mendel worked on garden pea (Pisum sativum).
Reason (R) Garden pea belongs to family-Malvaceae.

Select an option to see the answer and solution.

Q195

In which of the following methods of hybridization the recipient parent is crossed to a donor parent?

Select an option to see the answer and solution.

Q196

Consider the following statements.
1. Use and disuse of organs.
2. Inheritance of acquired characters.
3. Branching descent
4. Natural selection
5. Mutation
6. Reproductive isolation
The two key concepts of Darwinism from the given options are

Select an option to see the answer and solution.

Q197

The Oparin-Haldane theory regarding origin of life suggests that

Select an option to see the answer and solution.

Q198

Which of the following theories suggests that the plants and animals that have inhabited the earth have been changing through millions of years in the different geological periods of the earth's history?

Select an option to see the answer and solution.

Q199

The major functions, which ectomycorrhizae perform, include

Select an option to see the answer and solution.

Q200

The unit of heredity in our body is called

Select an option to see the answer and solution.

Prev 8 9 10 11 12 Next