13 + Interview Questions in MOLECULAR BIOLOGY IN GENERAL AWARENESS Page 1 InterviewSolution

1.	The process that forms complementary RNA from DNA-(a) Transcription(b) Translation(c) Transduction(d) Terminalization
Answer» The answer is (a) Transcription

Discussion

2.	Scientists who propounded the double-helical model of DNA-(a) Khorana & Nirenberg(b) Watson & Crick(c) Beedle & Tautum(d) Morgan & Bridges
Answer» The answer is (b) Watson & Crick

Discussion

3.	Codon is(a) The sequence of two nucleotides in mRNA(b) The sequence of three nucleotides in rRNA(c) The sequence of three nucleotides in mRNA(d) Sequence of two nucleotides in tRNA
Answer» The answer is (c) Sequence of three nucleotides in mRNA

Discussion

4.	Where RNA polymerase is found in eukaryotic cells?
Answer» The answer is Nucleoplasm (nucleus).

Discussion

5.	What is recon?
Answer» Unit of recombinations in gene.

Discussion

6.	Which nitrogen base is found in RNA in place of thymine.
Answer» The answer is Uracil.

Discussion

7.	Name any two types of DNA.
Answer» The answer is A-DNA & Z-DNA.

Discussion

8.	What are the complementary genes?
Answer» One of two or more genes that when present together produce effects qualitatively different from the separate effect of any one of them.

Discussion

9.	Define gene.
Answer» The gene is a smallest unit of genetics. The term gene was coined by Johanson (1909). The gene is a linear sequence of nucleotides in DNA that determines the heredity of a specific character. The genes store and express the genetic informations that will contribute towards the phenotype, and will be passed on to the successive generations. Each gene occupies a special position in a chromosome which is termed as locus. Structure of Gene: Seymor Benzer (1955) subdivided gene into different units such as- Cistron – It is the largest part of gene (DNA). It is the functional unit of gene. It can synthesize one polypeptide. Recon – It is the small part of the gene which is a unit of recombination. It may be as small as a single nucleotide pair. It can undergo crossing over & recommbination. Muton – It is smallest unit of the gene that can undergo mutation. Operon – It is a group of genes having an operator gene, a structural gene and other genes in sequence which all function as a unit. Replicon – It is the smallest part of DNA that replicates from a single origin of replication or any genetic element that can regulate and effect its own replication from initiation to completion. Complan – It is a DNA segment that is responsible for complementation. Some enzymes are made up of two or more polypetide chains. Their active groups are complementary to each other.

9.

Define gene.

Answer»

The gene is a smallest unit of genetics. The term gene was coined by Johanson (1909). The gene is a linear sequence of nucleotides in DNA that determines the heredity of a specific character. The genes store and express the genetic informations that will contribute towards the phenotype, and will be passed on to the successive generations. Each gene occupies a special position in a chromosome which is termed as locus.

Structure of Gene:

Seymor Benzer (1955) subdivided gene into different units such as-

Cistron – It is the largest part of gene (DNA). It is the functional unit of gene. It can synthesize one polypeptide.
Recon – It is the small part of the gene which is a unit of recombination. It may be as small as a single nucleotide pair. It can undergo crossing over & recommbination.
Muton – It is smallest unit of the gene that can undergo mutation.
Operon – It is a group of genes having an operator gene, a structural gene and other genes in sequence which all function as a unit.
Replicon – It is the smallest part of DNA that replicates from a single origin of replication or any genetic element that can regulate and effect its own replication from initiation to completion.
Complan – It is a DNA segment that is responsible for complementation. Some enzymes are made up of two or more polypetide chains. Their active groups are complementary to each other.

Discussion

10.	What is the triplet codon?
Answer» A sequence of three nucleotides that code one amino acid.

Discussion

11.	Write the names of purine nitrogen bases.
Answer» The answer is Adenine & Guanine.

Discussion

12.	Where DNA is found in organisms?
Answer» The answer is Nucleus.

Discussion

13.	Which is the initiation codon in protein synthesis?
Answer» The answer is AUG.

Discussion

Explore topic-wise InterviewSolutions in .

The process that forms complementary RNA from DNA-(a) Transcription(b) Translation(c) Transduction(d) Terminalization

Scientists who propounded the double-helical model of DNA-(a) Khorana & Nirenberg(b) Watson & Crick(c) Beedle & Tautum(d) Morgan & Bridges

Codon is(a) The sequence of two nucleotides in mRNA(b) The sequence of three nucleotides in rRNA(c) The sequence of three nucleotides in mRNA(d) Sequence of two nucleotides in tRNA

Where RNA polymerase is found in eukaryotic cells?

What is recon?

Which nitrogen base is found in RNA in place of thymine.

Name any two types of DNA.

What are the complementary genes?

Define gene.

What is the triplet codon?

Write the names of purine nitrogen bases.

Where DNA is found in organisms?

Which is the initiation codon in protein synthesis?