DNA, Genes & Genetics MCQs with Answers

Which amino acid forms disulfide bonds in insulin?

• A.Methionine
• B.Glycine
• C.Cysteine
• D.Serine

An important component of Darwin's theory is that ?

• A.Inherited variations arise by mutations
• B.Organisms acquire traits during their lifetime and pass them on
• C.All species were created simultaneously and remain unchanged
• D.Evolution occurs only through artificial selection

According to Lamarckism, the basis of evolution is _?

• A.Natural selection
• B.Inheritance of acquired characteristics
• C.Survival of the fittest
• D.Mutation and genetic drift

The formation of primitive streak occurs during which stage of embryogenesis?

• A.Blastula
• B.Gastrula
• C.Morula
• D.Zygote

The type of reproduction which is necessary for evolution is _?

• A.Asexual reproduction
• B.Binary fission
• C.Vegetative propagation
• D.Sexual reproduction

A sequence of three bases on messenger RNA is called ?

• A.A codon
• B.An anticodon
• C.A gene
• D.A nucleotide

Microevolution can best be described as following?

• A.Change in allele frequency of a population
• B.Formation of new species from existing ones
• C.Large-scale evolutionary changes over geological time
• D.Extinction of species due to environmental changes

Which of the following must exist in a population before natural selection can act upon that population?

• A.Stable environmental conditions
• B.Sexual reproduction
• C.Large population size
• D.Genetic variation among individuals

When two male pronuclei unite with a female pronucleus, it is termed as _?

• A.Polygyny
• B.Polyandry
• C.Polygamy
• D.Monogamy

The plants produced by genetic engineering are called ?

• A.Hybrid plants
• B.Transgenic plants
• C.Mutant plants
• D.Cloned plants