DNA, Genes & Genetics MCQs with Answers

What is the function of restriction enzymes?

• A.Unwind the DNA helix
• B.Join DNA fragments
• C.Synthesize new DNA strands
• D.Cut the DNA

Synaptonemal complex helps in _?

• A.Recombination during cell division
• B.Protein synthesis
• C.ATP production
• D.DNA replication

The allele for the black coat colour (B) is dominant over the allele for white coat colour (b) in horses. A cross between two black horses produces a foal with white coat colour. The probability of the second foal having black coat would be ?

• A.1/4
• B.1/2
• C.3/4
• D.1 (100%)

All are present in DNA except?

• A.Deoxyribose sugar
• B.Phosphate group
• C.Ribose sugar
• D.Nitrogenous bases

Which type of cell division is involved in gamete formation?

• A.Mitosis
• B.Meiosis
• C.Binary fission
• D.Budding

An individual has an additional sex chromosome. Which syndrome does it refer to?

• A.Down's syndrome
• B.Turner's syndrome
• C.Klinefelter's syndrome
• D.Edwards syndrome

Reduced hybrid viability occurs when _?

• A.Hybrids always die before birth
• B.Hybrid offspring are completely sterile
• C.Parents belong to the same species
• D.Genes of different parents interact in different ways

Which among the following is not a type of nitrogenous base?

• A.Adenine
• B.Guanine
• C.Thymine
• D.Tracil

mRNA's primary function is to ?

• A.Form the structural component of ribosomes
• B.Store genetic information permanently
• C.Catalyze chemical reactions in the cytoplasm
• D.Transmit genetic code from DNA to ribosomes

The exchange of parts of non-sister chromatids of homologous chromosomes during meiosis is called?

• A.Segregation
• B.Translocation
• C.Crossing over
• D.Replication