Which of the following statements are true with respect to a special complex called 'dicer'?P. It consists of deoxyribonuclease and DNA fragments.Q. It consists of ribonuclease and RNA fragments.R. It is involved in gene silencing.S. It triggers apoptosis.

Which of the following statements are true with respect to a special complex called 'dicer'?<br>P. It consists of deoxyribonuclease and DNA fragments.<br>Q. It consists of ribonuclease and RNA fragments.<br>R. It is involved in gene silencing.<br>S. It triggers apoptosis.

Consider the following statements about the genetic materials DNA and RNA: DNA chemically is less reactive and structurally more stable as compared to RNA. DNA is better for the transmission of genetic information as compared to RNA. Both DNA and RNA can mutate. Which of the statements given above are correct?

A

1 and 2 only

B

1 and 3 only

C

2 and 3 only

D

1, 2 and 3

Consider the following statements.
1. The smallest RNA is t RNA.
2. The most abundant RNA of cell is r RNA.
3. DNA can be formed over RNA through reverse transcriptase.
Which of the statements given above are false?

A

1 and 2

B

2 and 3

C

1, 2 and 3

D

None of the above

Consider the following statements : 1. DNA is much larger than RNA with millions of nucleotides. 2. DNA is self-replicating, unlike RNA. 3. DNA is synthesized from RNA. Which of the following statements given above is/are correct?

A

1 and 3 only

B

2 and 3 only

C

1 and 2 only

D

1, 2, and 3

Consider the following statements: 1. DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. 2. DNA is a double-stranded molecule, while RNA is a single-stranded molecule. 3. DNA is not stable under alkaline conditions, while RNA is stable. Which of the given above statements is/are correct?

A

1 and 2

B

2 only

C

2 and 3

D

1, 2 and 3

Consider the following statements about Antisense RNA 1. Antisense RNA is a single stranded RNA. 2. Antisense RNA is not related to RNA interference. Which of the above statements is/are correct?

A

Only 1

B

Only 2

C

Both 1 and 2

D

Neither 1 nor 2

Consider the following statements regarding DNA replication and choose the correct answer:
1. The very first requirement of DNA synthesis is the presence of a template or plan along which the new strand is to be constructed
2. The second requirement is of a DNA-dependent-DNA polymerase or simply DNA polymerase enzyme
3. A DNA Pol cannot join two free nucleotides; one of them must be anchored by hydrogen bonds to a DNA strand
4. Replication takes place bidirectionally

A

1, 2, 3 and 4 are true

B

Only 2 and 4 are true

C

Oniy 2, 3 and 4 are true

D

Only 1 and 2 are true

Steps of Recombinant DNA technology are given below.
1. Identification and isolation of the genetic material.
2. Fragmentation of DNA.
3. Obtaining the foreign gene product.
4. Downstream processing.
5. Ligation of DNA fragmentation into the vector.
6. Isolation of desired DNA fragments.
7. Amplification of gene of interest.
8. Transfer of Recombinant DNA into the host cell/organism.
The correct sequence of steps is

A

3, 1, 2, 4, 6, 5, 7, 8

B

1, 4, 3, 2, 5, 7, 6, 8

C

1, 2, 6, 7, 5, 8, 3, 4

D

8, 6, 7, 5, 1 , 4, 2, 3

Consider the following statements.
1. Golden rice is vitamin A rich.
2. Replacement of faulty gene by normal gene is called gene therapy.
3. Transgenic organism carrying introduced foreign gene also called genetically modified organism.
Which of the statements given above are true?

A

1 and 2

B

2 and 3

C

1 and 3

D

1, 2 and 3

Consider the following statements regarding the DNA-mediated gene transfer and choose the correct answer:
1. DNA fragments carrying the gene to be transferred are mixed with a carrier DNA
2. They are then precipitated out with a calcium phosphate buffer
3. The precipitate is used to transform target cells
4. The Ca-precipitated DNA enters the cell by exocytosis

A

Only 1, 2 and 4 are true

B

Only 3 and 4 are true

C

Only 2, 3 and 4 life true

D

Only 1, 2 and 3 are true

Which of the following statements about gene therapy are correct?
P. Affected individuals, but not their progeny, can be cured through germline gene therapy.
Q. Affected individuals, as well as their progeny, can be cured through germline gene therapy.
R. Affected individuals, but not their progeny, can be cured through somatic gene therapy.
S. Affected individuals, as well as their progeny, can be cured through somatic gene therapy.

A

P and R only

B

P and S only

C

Q and R only

D

Q and S only

Which of the following statements are true with respect to a special complex called 'dicer'?
P. It consists of deoxyribonuclease and DNA fragments.
Q. It consists of ribonuclease and RNA fragments.
R. It is involved in gene silencing.
S. It triggers apoptosis.

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