DNA, Genes & Genetics MCQs with Answers

Two strands of DNA are ?

• A.Parallel to each other
• B.Antiparallel to each other
• C.Perpendicular to each other
• D.Randomly oriented to each other

Which one of the following terms is used to describe the base pairing rule in DNA?

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

A particular cell has half as much DNA as some other cells in a mitotically active tissue. The cell in question is most likely in ?

• A.S phase
• B.G2 phase
• C.G1 phase
• D.M phase

A change in the frequency of alleles in a population over time is called _?

• A.Speciation
• B.Macroevolution
• C.Genetic drift
• D.Microevolution

Which of the following pieces of evidence most strongly supports the common origin of all life on Earth?

• A.All organisms require oxygen for respiration
• B.All organisms reproduce sexually
• C.All organisms use essentially the same genetic code
• D.All organisms contain chloroplasts

Which process takes place when sex cells are divided and gametes are formed during the process of reproduction in humans?

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

DNA is made up of small units called nucleotides. Each nucleotide consists of three components. These are ?

• A.5-Carbon sugar, Amino acid, Phosphate group
• B.6-Carbon sugar, Nitrogenous base, Sulfate group
• C.5-Carbon sugar, Nitrogenous base, Phosphate group
• D.Ribose sugar, Fatty acid, Phosphate group

Which of the following statements about colour blindness is correct?

• A.It is a result of aging only
• B.It is caused by a bacterial infection
• C.It occurs due to vitamin A deficiency
• D.It is genetically linked

PCR stands for?

• A.Polymer Chain Replication
• B.Protein Chain Reaction
• C.Polymerase Copy Reaction
• D.Polymerase Chain Reaction

Plants expressing foreign genes introduced by genetic engineering are ?

• A.Transgenes
• B.Hybrids
• C.Mutants
• D.Clones