Heredity and evolution Worksheet-8

Heredity and evolution Worksheet-8

51. A section of DNA which provides information for protein is known as:

A. Gene              B. Genome        C. Fragment     D. All of these

52. All traits are controlled by:

A. Genes             B. Enzymes       C. Hormones    D. Regulators

53. The number of chromosomes in a somatic cell is:

A. same as that of sperm            B. same as that of ovum

C. same as that of zygote            D. same as that of gamete

54. Alteration in DNA sequence does not occur because of:

A. Variation                                   B. Mutation

C. Adaptation                                D. Recombination

55. Which of the following is a smallest structure?

A. Chromosome                            B. Gene

C. DNA                                           D. Nucleotide

56. Codon is a triplet of:

A. DNA                                           B. Gene

C. Nucleotide                                 D. Nucleoside

57. Synthesis of protein molecule from RNA is known as:

A. Replication                               B. Recombination

C. Transcription                           D. Translation

58. Which of the following is incorrect?

A. Dominant allele is expressed in homozygous condition.

B. Recessive allele is expressed only in homozygous condition.

C. Dominant allele is expressed in heterozygous condition also.

D. Recessive allele is expressed in heterozygous condition also.

59. Which of the following trait is recessive in pea plant?

A. Round shape of seeds             B. Green color of seeds

C. Axial position of flowers        D. Tall height of plants

60. In plants fertilization occurs:

A. Over stigma                              B. In style

C. In ovary                                     D. In filament

Answer Key:

51. A
52. A
53. C
54. C
55. D
56. C
57. D
58. D
59. B
60. C