DNA, Genes & Genetics MCQs with Answers

The genetic information present in the shape of threads in nucleus is called ?

• A.Ribosomes
• B.Chromosomes
• C.Lysosomes
• D.Centrosomes

In meiosis, daughter cells have _ number of chromosomes compared to parent cells.

• A.Triple
• B.Double
• C.Same
• D.Half

A change in allele frequency in a population is called?

• A.Natural selection
• B.Gene flow
• C.Mutation
• D.Genetic drift

The Deoxyribonucleic acid is abbreviated as ?

• A.DRA
• B.RNA
• C.ATP
• D.DNA

The proportion of mRNA to the total DNA in the cell is _?

• A.25 to 30%
• B.5 to 10%
• C.15 to 20%
• D.1 to 2%

In inbreeding populations, the level of heterozygosity _?

• A.First increases then decreases
• B.Increases
• C.Remains unchanged
• D.Decreases

The production of protein from messenger RNA is called ?

• A.Transcription
• B.Translation
• C.Transformation
• D.Replication

Why does cytosine not form a bond with adenine?

• A.Cytosine is a pyrimidine and adenine is a purine, but they have incompatible hydrogen bond donors and acceptors
• B.Cytosine and adenine are both purines and cannot pair together
• C.Cytosine is a purine and adenine is a pyrimidine, so their ring structures do not match
• D.Cytosine and adenine both lack hydrogen atoms needed for bonding

Transcription is most similar to ?

• A.Replication
• B.Translocation
• C.Transformation
• D.Translation

Which one of the following correctly describes the sequence of events in protein synthesis?

• A.Transcription, then replication, then translation
• B.Replication, then transcription, then translation
• C.Translation, then transcription, then replication
• D.Replication, then translation, then transcription