Consider the given two statements:
Statement I:
In a double stranded DNA molecule, the amount of Guanine should be equal to Cytosine and the amount of Adenine should be equal to Thymine.
Statement II:
There are two hydrogen bonds between Adenine and Thymine and three hydrogen bonds between Guanine and Cytosine.
1.
Both Statement I and Statement II are correct and Statement II correctly explains Statement I
2.
Both Statement I and Statement II are correct but Statement II does not correctly explain Statement I
3.
Statement I is correct but Statement II is incorrect
4.
Statement I is incorrect but Statement II is correct
Subtopic: Â DNA Double Helix |
 67%
Level 2: 60%+
Hints
Suppose you are provided with an actively dividing culture of E. coli bacteria to which radioactive thymine has been added. What would happen if a cell replicates once in the presence of this radioactive base?
1. One of the daughter cells, but not the other, would have radioactive DNA.
2. Neither of the two daughter cells would be radioactive.
3. All four bases of the DNA would be radioactive.
4. DNA in both daughter cells would be radioactive.
1. One of the daughter cells, but not the other, would have radioactive DNA.
2. Neither of the two daughter cells would be radioactive.
3. All four bases of the DNA would be radioactive.
4. DNA in both daughter cells would be radioactive.
Subtopic: Â DNA Replication |
 56%
Level 3: 35%-60%
Please attempt this question first.
Hints
Which of the following provides some evidence that RNA probably evolved before DNA?
1. RNA polymerase uses DNA as a template.
2. RNA polymerase makes a single-stranded molecule.
3. RNA polymerase does not require localized unwinding of the DNA.
4. DNA polymerase uses primer, usually made of RNA
1. RNA polymerase uses DNA as a template.
2. RNA polymerase makes a single-stranded molecule.
3. RNA polymerase does not require localized unwinding of the DNA.
4. DNA polymerase uses primer, usually made of RNA
Subtopic: Â DNA vs RNA as Genetic Material |
 62%
Level 2: 60%+
Please attempt this question first.
Hints
A section of double stranded DNA is composed of 41% adenine bases. What is the percentage of cytosine bases in this section of DNA?
1. 18%
2. 9%
3. 36%
4. 82%
1. 18%
2. 9%
3. 36%
4. 82%
Subtopic: Â DNA Double Helix |
 90%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Genes involved in turning on (or) off the transcription of a set of structural genes are called
1. Operator genes
2. Polymorphic genes
3. Redundant genes
4. Regulatory genes
1. Operator genes
2. Polymorphic genes
3. Redundant genes
4. Regulatory genes
Subtopic: Â Gene Regulation: Lac Operon |
 70%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Which of the following is the sequence of mRNA transcribed from the below DNA?
3' - ATCCCAGGTACCAT - 5'
1. 3' - UAGGGUCCAUGGUA - 5'
2. 5' - UAGGGUCCAUGGUA - 3'
4. 3' -TAGGGTCCATGGTA -5'
4. 5' - TAGGGTCCATGGTA - 3'
3' - ATCCCAGGTACCAT - 5'
1. 3' - UAGGGUCCAUGGUA - 5'
2. 5' - UAGGGUCCAUGGUA - 3'
4. 3' -TAGGGTCCATGGTA -5'
4. 5' - TAGGGTCCATGGTA - 3'
Subtopic: Â Transcription |
 79%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Process of transcription in bacteria involves
1. Polyadenylation, initiation, termination
2. Capping, elongation, termination
3. Elongation, splicing, termination
4. Initiation, elongation, termination
1. Polyadenylation, initiation, termination
2. Capping, elongation, termination
3. Elongation, splicing, termination
4. Initiation, elongation, termination
Subtopic: Â Transcription |
 89%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
During replication in E.coli, mutations inactivate the gene coding for beta-galactosidase. Which of the following will be affected?
1. Hydrolysis of glucose
2. Hydrolysis of lactose
3. Hydrolysis of galactose
4. Hydrolysis of xylulose
1. Hydrolysis of glucose
2. Hydrolysis of lactose
3. Hydrolysis of galactose
4. Hydrolysis of xylulose
Subtopic: Â Gene Regulation: Lac Operon |
 84%
Level 1: 80%+
Please attempt this question first.
Hints
Match List I with List II
Choose the correct answer from the following given below:
1. A-III B-IV C-I D-II
2. A-I B-II C-III D-IV
3. A-II B-III C-IV D-I
4. A-IV B-III C-I D-II
| List I | List II |
| A. Frederick Griffith | I. DNA replicate semi-conservatively |
| B. Alfred Hershey & Martha chase | II. Cell-free system for protein synthesis |
| C. Matthew Meselson & Frank Stahl | III. Transforming principle |
| D. Marshall Nirenberg | IV. DNA-Genetic material |
1. A-III B-IV C-I D-II
2. A-I B-II C-III D-IV
3. A-II B-III C-IV D-I
4. A-IV B-III C-I D-II
Subtopic: Â DNA Replication |Â Search for Genetic Material |
 88%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Given below are two statements
In light of the above statements, choose the most appropriate answer from the options given below
1. Both statement I and statement II are true
2. Both statement I and statement II are false
3. Statement I is true but statement II is false
4. Statement I is false but statement II is true
| I: | The process of transcription in eukaryotes with additional complexities -There are at least three RNA polymerases in the nucleus with clear cut division of labor. The RNA polymerase I transcribes rRNAs whereas the RNA polymerase III is responsible for transcription of tRNA, 5S rRNA and snRNAs. The RNA polymerase II transcribes precursor of mRNA and hnRNA. |
| II: | The primary transcripts contain both the exons and introns are non-functional. It is subjected to a process of splicing whereas the introns are removed and exons are joined in a defined order. hnRNA undergoes additional processing called as capping and tailing. |
1. Both statement I and statement II are true
2. Both statement I and statement II are false
3. Statement I is true but statement II is false
4. Statement I is false but statement II is true
Subtopic: Â Transcription |
 79%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
© 2025 GoodEd Technologies Pvt. Ltd.