DNA, Genes & Genetics MCQs with Answers

The Blender Experiment to prove DNA as genetic material was performed by ?

• A.Hershey & Chase
• B.Watson & Crick
• C.Griffith
• D.Avery, MacLeod & McCarty

Number of chromosomes is specific in each species. In frog the number of chromosomes are _?

• A.24
• B.26
• C.46
• D.48

The law of independent assortment shows?

• A.Equal chances of gametes to receive genes
• B.Genes always travel together in inheritance
• C.Only dominant traits are passed to offspring
• D.All gametes receive identical sets of genes

In a DNA molecule, adenine nitrogenous base in one strand forms a link in the opposite strand with which one of the following nitrogenous bases?

• A.Guanine
• B.Uracil
• C.Cytosine
• D.Thymine

Which of the following is a purine base?

• A.Uracil
• B.Cytosine
• C.Thymine
• D.Adenine

Discontinuous variation refers to traits that ?

• A.Are influenced only by environmental factors
• B.Show a continuous range of phenotypes across a population
• C.Exist in distinct categories with no intermediate forms
• D.Blend gradually from one extreme to another

About 170 types of amino acids are found to occur in cells. How many are involved in making proteins?

• A.20 amino acids
• B.22 amino acids
• C.25 amino acids
• D.18 amino acids

The mutations significant for evolution are _?

• A.Somatic mutations
• B.Genetic mutations
• C.Induced mutations
• D.Chromosomal mutations

Drosophila sperm cell contains ?

• A.4 chromosomes
• B.8 chromosomes
• C.2 chromosomes
• D.16 chromosomes

The _ is made up of a double helix of two complementary strands.

• A.RNA
• B.Carbohydrate
• C.Protein
• D.DNA