Unlike DNA, which is mainly double stranded, RNA is double stranded, although an RNA molecule can self-hybridize at certain regions to form partial double-stranded structures.

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 : 1. Micro RNA (miRNA) is an exogenous double-stranded RNA uptaken by cells, while small interfering RNA (siRNA) is an endogenous single-stranded RNA. 2. miRNA mainly serves as a drug target, therapeutic agent and biomarker tool while siRNA mainly serves as a therapeutic agent. Which of the following statements given above is/are correct?

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2

If u (x, y, z, t) = f(x + iβy - vt) + g(x - iβy - vt), where f and g are arbitrary and twice differentiable functions, is a solution of the wave equation $$\frac{{\partial {u^2}}}{{\partial {x^2}}} = \frac{{{\partial ^2}u}}{{\partial {y^2}}} = \frac{1}{{{c^2}}}\frac{{{\partial ^2}u}}{{\partial {t^2}}}$$ then β is

A

$${\left( {1 - \frac{v}{c}} \right)^{\frac{1}{2}}}$$

B

$$\left( {1 - \frac{v}{c}} \right)$$

C

$${\left( {1 - \frac{{{v^2}}}{{{c^2}}}} \right)^{\frac{1}{2}}}$$

D

$$\left( {1 - \frac{{{v^2}}}{{{c^2}}}} \right)$$

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

RNA secondary structure is composed primarily of triple-stranded RNA regions formed by folding the single-stranded molecule back twice on itself.

A

True

B

False

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 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

Which of the following statements are correct? 1. The DNA Technology (Use and Application) Regulation Bill, 2019 provides for the regulation of use of DNA technology for establishing the identity of certain persons. 2. DNA is made up of 26 pairs of chromosomes and provides instructions for building an entire organism and proteins. 3. DNA is composed of two chains, which coil around each other to form a double helix carrying the genetic instructions used in the growth. 4. Under the Bill, DNA profiling is allowed only in respect of criminal matters. Select the correct answer using the code given below:

A

Only 1 and 2

B

Only 2 and 3

C

Only 1 and 3

D

1, 2, 3 and 4

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

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

Unlike DNA, which is mainly double stranded, RNA is double stranded, although an RNA molecule can self-hybridize at certain regions to form partial double-stranded structures.

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