The fragments formed during sputtering can be either neutral atoms or ions. The ions can only be positive.

The combined mixture of all labeled DNA fragments is electrophoresed to _____ the fragments by______ and the ladder of fragments is scanned for the presence of each of the four labels.

A

separate, size

B

separate, pH

C

assimilate, pH

D

assimilate, size

Positive ions are formed from neutral atoms by loss of

A

neutrons

B

protons

C

nuclear charge

D

electrons

A collection of N atoms is exposed to a strong resonant electromagnetic radiation with N_g atoms in the ground state and N atoms in the excited state, such that N_g + N_e = N. This collection of two-level atoms will have the following population distribution

A

N_g ≪ N_e

B

N_g ≫ N_e

C

N_g ≈ N_e ≈ N/2

D

N_g - N_e ≈ N/2

Ion sputtering makes use of highly energetic meta ions for bombardment.

A

True

B

False

During storage of DNA fragments for making library, larger fragments are having more chances of getting lost.

A

True

B

False

Consider the following statements regarding chain elongation during DNA synthesis and choose the correct answer:
1. The separated strands are kept open by DNA binding proteins (DBPs)
2. A DNA chain is initiated on the 3'- OH end of the primer
3. Okazaki fragments are synthesized on one strand; there is continuous DNA synthesis in the other strand
4. Okazaki fragments are joined by endonuclease

A

1, 2, 3 and 4 are true

B

Only 2, 3 and 4 are true

C

Only 1, 2 and 3 are true

D

Only 1, 3 and 4 are true

A cubic cell consists of two atoms of masses m, and m₂(m₁ > m₂) with m₁ and m₂ atoms situated on alternate planes. Assuming only nearest neighbour interactions, the centre of mass of the two atoms

A

moves with the atoms in the optical mode and remains fixed in the acoustic mode

B

remains fixed in the optical mode and moves with the atoms in the acoustic mode

C

remains fixed in both optical and acoustic modes

D

moves with the atoms in both optical and acoustic modes

Each of the questions below consists of a question and three statements numbered I, II and III given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read all the three statements and give answer. There are six letters E, I, P, G, N and O is PIGEON the word formed after performing the following operations using these six letters only? I. O is placed fourth to the right of P. G is not placed immediately next to either P or O. II. N is placed immediately next (either left or right) to O. E is placed immediately next (either left or right) to G. III. Both I and E are placed immediately next to G. The word does not begin with N. P is not placed immediately next to E.

A

If the data in statement I and II are sufficient to answer the question, while the data in statement III alone are not sufficient to answer the question.

B

If the data in statement I and III are sufficient to answer the question, while the data in statement II alone are not sufficient to answer the question.

C

If the data in statement II and III are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.

D

If the data either statement I alone or statement II alone or statement III alone are sufficient to answer the question.

Study the following statements.
1. A bond formed by the transfer of electrons between atoms of the element is called ionic bond.
2. A bond formed by sharing of electrons between atoms of the elements is called covalent bond.
Which of the statements given above is/are correct?

A

Only 1

B

Only 2

C

1 and 2

D

None of the above

The shotgun approach does not require knowledge of physical mapping of the clone fragments, but rather a robust computer assembly program to join the pieces of random fragments into a single, whole-genome sequence.

A

True

B

False

The fragments formed during sputtering can be either neutral atoms or ions. The ions can only be positive.

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