DNA vs RNA

Q. Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by

1. (Base-Phosphate)${}_n$
2. Sugar-Phosphate
3. Base-Sugar-Phosphate
4. Base-Sugar-OH

Q. DNA differs from RNA in

1. Nature of purines alone
2. Nature of sugar alone
3. Nature of sugar and pyrimidines
4. All the above

Q. The base that is not found in DNA but found in RNA is

1. Thymine
2. Uracil
3. Adenine
4. Guanine

Q.

Why is double-stranded RNA more stable than DNA ?

Q.

Which of the following statements are incorrect?

1) RNA acts as a genetic material as well as a catalyst.

2) RNA is more stable than DNA.

3) RNA has evolved from DNA

Q.

12. Discuss with your teacher and find out how to distinguish between:

(a) Plasmid DNA and Chromosomal DNA?

(b) RNA and DNA

(c) Exonuclease and endonuclease

Q. Match the following, considering nucleic acids:

$\begin{array}{cc}Column-I& Column-II\\ p.SugarinDNA& i.Adenine,Guanine\\ q.Purines& ii.Ribose\\ r.SugarinRNA& iii.Deoxyribose\\ s.Pyrimidines& iv.Cytosine,Thymine,Uracil\end{array}$

1. p-iv, q-ii, r-iii, s-i
2. p-iii, q-iv, r-ii, s-i
3. p-ii, q-i, r-iii, s-iv
4. p-iii, q-i, r-ii, s-iv

Q. The base that is not found in DNA but found in RNA is

1. Thymine
2. Uracil
3. Adenine
4. Guanine

Q.

How do you find $\mathrm{N}$ and $\mathrm{C}$ terminals?

Q. DNA replication includes which of the following enzymes?

1. DNA ligase
2. DNA polymerase and ligase
3. RNA polymerase and ligase
4. All of the above

Q.

What is the main function of cytokinins?

Q. What makes RNA mutate faster than DNA?

1. The presence of uracil in place of thymine
2. Single-stranded structure
3. The 2’-OH group
4. None of these

Q. Type II restriction endonuclease cleave DNA at?

1. Random sequence
2. Specific DNA sequence
3. Single stranded sequence
4. None of the above

Q. The base that is not found in DNA but found in RNA

1. Thymine
2. Uracil
3. Adenine
4. Guanine

Q. Thymine is stabler than uracil.

1. True
2. False

Q. Which of the following criteria should be fulfilled by a molecule to act as genetic material?
(i) It should be able to replicate.
(ii) It should be structurally and chemically stable.
(iii) It should undergo slow mutations.
(iv) It should be able to express itself in the form of 'Mendelian characters'

1. (i) and (ii)
2. (ii), (iii) and (iv)
3. (i), (ii) and (iii)
4. (i), (ii), (iii) and (iv)

Q. Which of the following RNA can only be traced inside the nucleus?

1. rRNA
2. tRNA
3. mRNA
4. hnRNA

Q.

According to evolution where did DNA come from?

Q.

Which of the following is the difference between DNA and RNA?

1. DNA is double stranded, while RNA is single stranded.

2. DNA has Thymine, while RNA has Uracil.

3. DNA has deonyribose sugar, RNA has oxyribose or ribose

4. All of the above

Q. Which of the following criteria should be fulfilled by a molecule to act as genetic material?
(i) It should be able to replicate.
(ii) It should be structurally and chemically stable.
(iii) It should undergo slow mutations.
(iv) It should be able to express itself in the form of 'Mendelian characters'

1. (i), (ii) and (iii)
2. (i), (ii), (iii) and (iv)
3. (ii), (iii) and (iv)
4. (i) and (ii)

Q. Dehyration involving elimination of a water moiety is not seen during which of the following?
(a) Formation of a glycosidic bond
(b) Formation of a phosphoester bond
(c) Formation of a disulphinde bond
(d) Formation of a peptide bond
(e) Pairing between thymine and adenine on two antiparallel strands of DNA.

1. c, d & e
2. a & b only
3. a, b, c & d
4. c & e only

Q. During chain elongation, peptide bond is formed between a carboxylic group of 1${}^{st}$ amino acid and an amino group of 2${}^{nd}$ amino acid is catalyzed by

1. Aminoacyl synthetase
2. Aminoacyl transferase
3. Peptidyl transferase
4. Chloramphenicol

Q.

Why DNA acts as a genetic material rather than RNA?

Q. Which of the following is/are similarities between DNA and RNA?

1. It is chemically and structurally stable.
2. It provides scope for mutations leading to evolution.
3. It can replicate.
4. All of the above.

Q. Which of the following enzymes cut the DNA molecule at specific nucleotide sequence?

1. Restriction endonuclease
2. Exonuclease
3. RNA polymerase
4. DNA ligase

Q.

Match the types of nucleic acids given in column I with the items listed in column II and select the right answer showing the correct combination of alphabets of the two columns

$\begin{array}{cccc}& \text{Column I}& & \text{Column I}\\ & \text{Types of Nucleic acids}& & \text{Items}\\ A& \text{DNA}& e& \text{Pyridoxine}\\ B& \text{rRNA}& f& \text{Clover-leaf-model}\\ C& \text{tRNA}& g& \text{Duplex model}\\ & & h& \text{Ribosomes}\end{array}$

1. A = f, B = h, C = e

2. A = g, B = h, C = f

3. A = e, B = f, C = g

4. A = h, B = g, C = f

Q. Which one is non-genetic RNA?

1. tRNA
2. rRNA
3. mRNA
4. All the above

Q.

Who does a DNA get to know how to replicate itself and what is actually present una DNA that governed how we look

Q. Which of the following criteria should be fulfilled by a molecule to act as genetic material?
(i) It should be able to replicate.
(ii) It should be structurally and chemically stable.
(iii) It should undergo slow mutations.
(iv) It should be able to express itself in the form of 'Mendelian characters'

1. (i) and (ii)
2. (ii), (iii) and (iv)
3. (i), (ii) and (iii)
4. (i), (ii), (iii) and (iv)

Q. Non-genetic RNA is of ?

1. Two types
2. Three types
3. Only one type
4. None of the above