Molecular Basis of Inheritance Test

Question 1
1 / -0

The best method to determine the homozygous and heterozygous of an individual is

A
Self-fertilization

B
Test cross

C
Back cross

D
Inbreeding

Question 2
1 / -0

Each strand of DNA has a typical structure. Which of the following statements correctly explains its structure?

A
The sugar-phosphate chain on the outside and the bases on the inside are held together by weak hydrogen bonds.

B
The sugar-phosphate chain on the inside and the bases on the outside are held together by weak hydrogen bonds.

C
The sugar-phosphate chain on the outside and the bases on the inside are held together by strong hydrogen bonds.

D
The sugar-phosphate chain on the inside and the bases on the outside are held together by strong hydrogen bonds.

E
None of these

Question 3
1 / -0

Which of the following sequences of the steps involved in the process of polymerisation of amino acids to form a polypeptide is correct?

(1) Activation of amino acids, Termination of polypeptide synthesis, Elongation of polypeptide synthesis, Initiation of polypeptide synthesis
(2) Initiation of polypeptide synthesis, Activation of amino acids, Elongation of polypeptide synthesis, Termination of polypeptide synthesis
(3) Termination of polypeptide synthesis, Elongation of polypeptide synthesis, Activation of amino acids, Initiation of polypeptide synthesis
(4) Activation of amino acids, Initiation of polypeptide synthesis, Elongation of polypeptide synthesis, Termination of polypeptide synthesis

A
(1)

B
(2)

C
(3)

D
(4)

E
None of these

Question 4
1 / -0

When live rough-type bacteria and heat killed S-type were injected together into mice, they died due to pneumonia. Which of the following explains this correctly?

A
Rough-type bacteria, when injected into mice, produce pneumonia.

B
Smooth-type bacteria, when injected into mice, produce pneumonia.

C
Some factors from the dead S-cells convert the live R-cells into S-cells and pneumonia is produced.

D
Some factors from the dead S-cells, when injected into mice, became live S-cells and produced pneumonia.

E
None of these

Question 5
1 / -0

The building block of nucleic acid is

A
nitrogenous base

B
ribose sugar

C
phosphate group

D
nucleotide

E
None of these

Question 6
1 / -0

The physical expression or appearance of a character is called as

A
Ecotype

B
Phenotype

C
Morphology

D
Genotype

Question 7
1 / -0

Which of the following shows the correct type of mutation that takes place on insertion of three bases?

A
Inserts multiple codons

B
Inserts one codon

C
Alters the reading frame from the point of insertion

D
Inserts multple amino acids

E
None of these

Question 8
1 / -0

The tendency of offspring to differ from parents is called

A
Resemblance

B
Variation

C
Inheritance

D
Heredity

Question 9
1 / -0

Which of the following does not define the transcription unit in a DNA?

A
Terminator

B
Promoter

C
Intron

D
Structural gene

E
None of these

Question 10
1 / -0

Which of the following base pairs in DNA are correct?

A
Adenine-Cytosine

B
Guanine-Cytosine

C
Adenine-Guanine

D
Guanine-Thymine

E
None of these

Question 11
1 / -0

In point mutation, how many base pairs are inserted or deleted?

A
Three

B
Multiples of three

C
Two

D
One

E
None of these

Question 12
1 / -0

In a genetic code, some codons do not code for amino acids that function as stop codons. Which of the following does not belong to this group?

A
UAG

B
UAA

C
UUU

D
UGA

E
None of these

Question 13

1 / -0

Match the following:

1.	Splicing	a.	Addition of methyl guanosine triphosphate at 5'–end
2.	Capping	b.	Addition of adenylate residues at 3'–end
3.	Tailing	c.	Removal of non-coding introns

1 - c, 2 - b, 3 - a

1 - c, 2 - a, 3 - b

1 - a, 2 - c, 3 - b

1 - b, 2 - a, 3 - c

None of these

Question 14
1 / -0

Each gametes carry

A
Only one of the alleles

B
Only dominant allele

C
Only recessive allele

D
Glucose

Question 15
1 / -0

In which of the following processes does copying of genetic information from one strand of DNA into RNA take place?

A
Replication

B
Transcription

C
Mutation

D
Translation

E
None of these

Question 16
1 / -0

Which of the following RNA polymerase enzymes catalyse(s) the synthesis of all types of RNA?

A
RNA polymerase I

B
RNA polymerase II

C
RNA polymerase III

D
All of the above

E
None of these

Question 17
1 / -0

Which of the following codes has a dual function?

A
AUG

B
UUU

C
UGA

D
UAA

E
None of these

Question 18
1 / -0

Which of the following is/are the characteristic(s) of genes?

A
Replication and transmission to progeny

B
Mutability

C
Storage of hereditary information

D
All of the above

Question 19
1 / -0

The alternate forms of a gene is called

A
Recessive character

B
Dominant character

C
Alternate gene

D
Alleles

Submit Test

Molecular Basis...

Question 1

Self-fertilization

Test cross

Back cross

Inbreeding

Question 2

The sugar-phosphate chain on the outside and the bases on the inside are held together by weak hydrogen bonds.

The sugar-phosphate chain on the inside and the bases on the outside are held together by weak hydrogen bonds.

The sugar-phosphate chain on the outside and the bases on the inside are held together by strong hydrogen bonds.

The sugar-phosphate chain on the inside and the bases on the outside are held together by strong hydrogen bonds.

None of these

Question 3

(1)

(2)

(3)

(4)

None of these

Question 4

Rough-type bacteria, when injected into mice, produce pneumonia.

Smooth-type bacteria, when injected into mice, produce pneumonia.

Some factors from the dead S-cells convert the live R-cells into S-cells and pneumonia is produced.

Some factors from the dead S-cells, when injected into mice, became live S-cells and produced pneumonia.

None of these

Question 5

nitrogenous base

ribose sugar

phosphate group

nucleotide

None of these

Question 6

Ecotype

Phenotype

Morphology

Genotype

Question 7

Inserts multiple codons

Inserts one codon

Alters the reading frame from the point of insertion

Inserts multple amino acids

None of these

Question 8

Resemblance

Variation

Inheritance

Heredity

Question 9

Terminator

Promoter

Intron

Structural gene

None of these

Question 10

Adenine-Cytosine

Guanine-Cytosine

Adenine-Guanine

Guanine-Thymine

None of these

Question 11

Three

Multiples of three

Two

One

None of these

Question 12

UAG

UAA

UUU

UGA

None of these

Question 13

1 - c, 2 - b, 3 - a

1 - c, 2 - a, 3 - b

1 - a, 2 - c, 3 - b

1 - b, 2 - a, 3 - c

None of these

Question 14

Only one of the alleles

Only dominant allele

Only recessive allele