Biology GK · all questions

Gentics and Evoloution
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Q201

The broken ends of the chromatids behave as if they are 'sticky', and undergo fusion which results in the formation of a

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Q202

Darwin finches' refers to a group of

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Q203

The main doctrine of Neo-Lamarckism is that

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Q204

The actual distance between two genes is said to be equivalent to the

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Q205

The major steps of prebiotic molecular evolution include

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Q206

The commonly used osmotic stabilizers to stabilize the newly released protoplasts include

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Q207

Match List-I with List-II and select the correct answer:

List-I (Sites of DNA polymerase)	List-II (Functions)
a. A template site	1. Contains the primer on which the newly synthesized DNA strand grows
b. A primer site	2. Present at the tip of the primer, which has a terminal 3' OH group
c. A primer terminus site	3. Attaches to the DNA template and holds a section of DNA in place
d. A triphosphate	4. Where an incoming nucleoside triphosphate matches a complementary nucleotide on the DNA template and is bound to the 3' OH position of the primer

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Q208

The three structural elements in eukaryotic chromosomes essential for the commitments of chromosome in the life history of a cell include

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Q209

What determines the sex of a child?

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Q210

Match the following columns.

Column I	Column II
a. Darwin	1. Inherited
b. Genetic drift	2. Not inherited
c. Mutation in germ cells	3. HMS Beagle
d. Mutation in somatic cells	4. Founder effect

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Q211

The active repressor binds to the inducer molecule to form an R-I complex which results in

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Q212

Evidence which favours the theory of acquired character are
1. Absence of limbs in snakes.
2. Presence of webbed toes in aquatic bird.
3. Lack of pigments in cave dwelling animals.
4. Darwin finches
5. Melanisation peppered moths
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Q213

The substitution or deletion of one, two or all of the nucleotides in a triplet alters the code which results in a

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Q214

When crossing over occurs within the inverted segment of a paracentric inversion,

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Q215

Which of the following situation would most likely result in the highest rate of natural selection?

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Q216

The technique devised to produce vast quantities of strong and healthy plantlets by rapid vegetative multiplication under controlled conditions is known as

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Q217

In farm yard manure the microorganisms decompose complex organic debris into a dark amorphous substance known as

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Q218

. . . . . . . . of species is a reflection of their evolutionary relationship.

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Q219

It is now held that the first cells in due course of abiogenesis gave rise to three equally ancient cell lines called

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Q220

Aseptic seedlings are produced by surface sterilizing the seeds in

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