Biomolecules-2 Set 3 MCQs

Q1 | A molecule of ATP is structurally most similar to a molecule of?

RNA

Protein

Lipid

Amino acid

Q2 | Which is the site of protein synthesis?

Chromosomes

DNA

Polysomes

Tonoplast

Q3 | Select the specific base pairs of DNA:

Adenine and Cytosine

Guanine and Adenine

Adenine and Thymine

Guanine and Uracil

Q4 | The DNA stands are antiparallel because of:

Ester bond

Phosphodiester bond

Disulphide bond

Hydrogen bond

Q5 | The distance between two chains of DNA molecules is:

34 A°

20 A°

3.4 A°

10 A°

Q6 | The length of one complete spiral of DNA is:

34 A°

3.4 A°

20 A°

340 A°

Q7 | Which one of the following bases is found only in RNA and not in DNA?

Guanine

Adenine

Uracil

Thymine

Q8 | The scientists who discovered the structure of DNA molecule

Miller and mandal

Khorana and Nirenberg

Calvin and Wilkinson

Waston and Crick

Q9 | Mention the example of dinuclotide in the given structure.

RNA with UA

RNA with CG

DNA with TA

DNA with CG

Q10 | The structure of DNA like a spiral ladder because

Purine and Pyrimidine are on the opposite side

Purine and Pyrimidine linked with hydrogen bond

All nucleotides join through a phosphodiester bond

Two polynucleotide chains arranged parallel to each other and are spirally Twisted

Q11 | The hydrogen bonds between adenine and guanine are

2

3

1

Q12 | Which of the following is correct?

A=T

C=G

G=A

A=C

Q13 | Nitrogen bases do not contain

Phosphorus

Nitrogen

Hydrogen

Carbon

Q14 | Which one is two ringed nitrogenous base?

Thymine

Adenine

Cytosine

Uracil

Q15 | Which of the following ratio is constant in the DNA of all the species?

A+U / T+C

A+G/ C+T

A+C / T+G

A+T / C+G

Q16 | m-RNA is the polymer of

Ribonucleotide

Ribonucleoside

Deoxyribonucleotide

Ribosome

Q17 | Which of the following is incorrect?

m-RNA is degreased after its function is over

t-RNA are synthesized by m-RNA

r-RNA is localized in the ribosome

m-RNA carries genetic code in to cytoplasm

Q18 | Which is longest of all RNA?

m-RNA

t-RNA

r-RNA

None above

Q19 | The common instant source of energy of cellular activities is

Mitochondria

DNA

RNA

ATP

Q20 | Which one is known as adapter molecule?

DNA

m-RNA

t-RNA

r-RNA

Q21 | The RNA transporting amino acid to the protein synthesizing site known as

t-RNA

r-RNA

m-RNA

Any one of a, b, c

Q22 | Match the column and find out the correct combinationColumn –I Column –II(P) Keratin (i) co-enzyme(Q) ATP (ii) pyrimidline(R) Cytosine (iii) polynucleotide(S) NAD (iv) Purine(T) Guanine (v) polypeptide

P-v, Q-iii, R-ii, S-i, T-iv

P-v, Q-iii, R-iv, S-I, T-ii

P-iii, Q-v, R-i, S- ii, T-iv

P-v, Q-i, R-ii, S-iii, T-iv

Q23 | Which is the special function of t-RNA?

Pick up code for m-RNA and bring it to r-RNA

Do protein synthesis

Carries the coded genetic information in to the cytoplasm

An adapter for attaching amino acid to m-RNA template during Protein synthesis

Q24 | Which are proportionally more compounds in all RNA’s?

m-RNA

t-RNA

r-RNA

a, b, c all

Q25 | Which is the part of DNA molecules that varies among DNA molecule

Pentose sugar

nitrogen base

phosphate

a & b both