Molecular Basis of Inheritance Test

Result

Molecular Basis of Inheritance Test - 29

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

If the total amount of adenine and thymine in a double-stranded DNA is 60% the amount of guainine in this DNA will be

A
15%

B
20%

C
30%

D
40%

Solution

If the amount of adenine+ thymine = 60%, then the amount of guanine + cytosine will be 40%.
So, the amount of guanine in this DNA will be = 20%.
Question 2
1 / -0

Select the correct option regarding genetic code of Glycine.

A
GUU, GUC, GUA

B
GAU, GAC, GAA

C
GGU, GGA, GGC

D
GGU, GGA, GCU
Solution
- The standard genetic code is represented as an RNA codon because, when proteins are made in a cell by ribosomes, it is mRNA that directs protein synthesis.
- Glycine is an amino acid, a building block for protein. The genetic code of glycine is GGU, GGA, GGC.
- So, the correct answer is 'GGU, GGA, GGC'
Question 3
1 / -0

What is incorrect about the above figure representing DNA replication?

A
The direction of DNA replication in strand (i)

B
The direction of DNA replication in strand (ii)

C
Discontinuous replication of strand (i)

D
Discontinuous replication of strand (ii)

Solution

DNA polymerase can polymerize nucleotides only in $$5'\rightarrow 3'$$ direction on $$3'\rightarrow 5'$$ strand because it adds them at the $$3'$$ end. Since, the two strands of DNA run in antiparallel directions, the two templates provide different ends for replication. Replication over the two templates thus proceeds in opposite directions. One strand with polarity $$3'\rightarrow 5'$$ forms its complementary strands continuously because $$3'$$ end of the latter is open for elongation. It is called leading strand. Replication is discontinuous on the other template with polarity $$5'\rightarrow 3'$$ because only a short segment of DNA strand can be built in $$5'\rightarrow 3'$$ direction due to exposure of a small stretch of template at one time. Short segments of replicated DNA are called Okazaki fragments.
Question 4
1 / -0

Which of the following is correct regarding genetic code?

A
UUU is the initiation codon which also codes for phenylalanie.

B
There are $$64$$ triplet codons and only $$20$$ amino acids.

C
Three random nitrogen bases specify the placement of one amino acid.

D
UAA is the nonsense codon which also codes for methionine.

Solution

There are $$64$$-triplet codons which code for $$20$$ amino acids. This is due to the degeneracy of code as some amino acids are influenced by more than one codon. Only tryptophan and methionine are specified by single codons. All other amino acids are specified by two (e.g., phenylalanine-UUU, UUC) to six (e.g., arginine- CGU, CGC, CGA, CGG, AGA, AGG) codons.
Question 5
1 / -0

A segment of DNA contains 1200 nucleotides, of which 200 have adenine base. How many cytosine bases are present in this segment of DNA?

A
100

B
200

C
400

D
800
Solution
- According to Chargaff's rule, the proportion of adenine is equal to thymine and the proportion of cytosine is equal to guanine because they are complementary bases.
- There are 200 adenine bases. The number of thymine bases will be equal to adenine which is 200 bases.
- The total number of bases is 1200. So, the remaining bases are 1200-(200+200)= 800.
- From the 800 bases, the number of cytosine and guanine will be the same, which is equal to 400 bases each.
Thus, the correct answer is option C.
Question 6
1 / -0

Out of 64 codons, 61 codons code for 20 types of amino acid. What is it called as?

A
Wobbling of codon

B
Overlapping of gene

C
University of codons

D
Degeneracy of genetic code

Solution

The genetic code is degenerate in that most amino acids are encoded by more than one codon with the exception of tryptophan and methionine which has only one codon. Codons that specify the same amino acids are called synonyms and these codons usually differ in the last base of the triplet.
Question 7
1 / -0

DNA multiplication is also called as

A
Replication

B
Transduction

C
Transcription

D
Translation

Solution

Multiplication of DNA is otherwise called as replication. It means the process of multiplication of DNA strand to give daughter strands. DNA replication is semi conservative in the case of eukaryotes.
Question 8
1 / -0

Which of the following statements is not true for retroviruses:

A
The gentic material in mature retroviruses in RNA

B
Retroviruses are causative agents or certain kinds of

cancer in man

C
DNA is not present at any stage in the life cycle of

retroviruses

D
Retroviruses carry gene for RNA-dependent DNA

polymerase
Question 9
1 / -0

What is an anticodon?

A
Paired triplet of bases on messenger RNA

B
Unpaired triplet of bases on rRNA

C
Paired triplet of bases on rRNA

D
An unpaired triplet of bases in an exposed position of tRNA

Solution

Anticodon is a sequence of three nucleotides in a region of transfer RNA that recognizes a complementary coding triplet of nulceotides in messenger RNA during translation by the ribosomes in protein biosynthesis.
Question 10
1 / -0

The experimental system used in studies of the discovery of replication of DNA has been

A
Drosophila melanogaster

B
Pneumococcus

C
Escherichia coli

D
Neurospora crassa

Solution

Escherichia coli is used for the studies related to the discovery of replication of DNA because of the following reasons:
a) E. coli is a single-celled organism and it grows and reproduces rapidly which leads to the enormous amount of sample DNA that can be used for the study and experiments.
b) E. coli can survive in variable growth conditions.
c) The naturally occurring strains of E.coli are harmless.
So, the correct answer is option C.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Molecular Basis of Inheritance Test - 29

Result

Molecular Basis of Inheritance Test - 29

Score

-

Rank

-

SHARING IS CARING

Question 1

15%

20%

30%

40%

Solution

Question 2

GUU, GUC, GUA

GAU, GAC, GAA

GGU, GGA, GGC

GGU, GGA, GCU

Solution

Question 3

The direction of DNA replication in strand (i)

The direction of DNA replication in strand (ii)

Discontinuous replication of strand (i)

Discontinuous replication of strand (ii)

Solution

Question 4

UUU is the initiation codon which also codes for phenylalanie.

There are $$64$$ triplet codons and only $$20$$ amino acids.

Three random nitrogen bases specify the placement of one amino acid.

UAA is the nonsense codon which also codes for methionine.

Solution

Question 5

100

200

400

800

Solution

Question 6

Wobbling of codon

Overlapping of gene

University of codons

Degeneracy of genetic code

Solution

Question 7

Replication

Transduction

Transcription

Translation

Solution

Question 8

The gentic material in mature retroviruses in RNA

Retroviruses are causative agents or certain kinds ofcancer in man

DNA is not present at any stage in the life cycle ofretroviruses

Retroviruses carry gene for RNA-dependent DNApolymerase

Question 9

Paired triplet of bases on messenger RNA

Unpaired triplet of bases on rRNA

Paired triplet of bases on rRNA

An unpaired triplet of bases in an exposed position of tRNA

Solution

Question 10

Drosophila melanogaster

Pneumococcus

Escherichia coli

Neurospora crassa

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

Retroviruses are causative agents or certain kinds of

cancer in man

DNA is not present at any stage in the life cycle of

retroviruses

Retroviruses carry gene for RNA-dependent DNA

polymerase