Free MCQs & Online Quiz Practice for Exams

Q: How many nucleotides are there in 12 mRNA codons: (2017 ETEA)

A) 12

B) 24

C) 36

D) 48

Q: Which of the following is a nonsense codon: (2017 ETEA)

A) UGA

B) UAU

C) CAU

D) GAU

Q: If a disorder is not present in family but fetus is affected before birth, it is known as: (2017 ETEA)

A) Somatic mutation

B) Hereditary mutation

C) Germ line mutation

D) De novo mutation

Q: What will happen if a nucleotide is deleted from a gene having 9 nucleotides: (2017 ETEA)

A) Change in phenotype

B) No change in phenotype

C) Synthesis of 3 amino acids

D) Synthesis of 4 amino acids

Q: In protein synthesis, the initiator tRNA carrying methionine lands on which site of ribosome: (2018 ETEA)

A) E site

B) P site

C) A site

D) C site

Q: Polyploidy is more common in: (2018 ETEA)

A) Plants

B) Animals

C) Bacteria

D) Virus

Q: Male having Down’s syndrome have sex chromosomes: (2018 ETEA)

A) XXY

B) XY

C) XYY

D) XYYY

Q: Amino acid leucine is coded by how many codons: (2018 ETEA)

A) 1

B) 2

C) 4

D) 6

Q: DNA polymerase III works always in: (2019 ETEA)

A) 5'-2' direction

B) 5'-3' direction

C) 3'-5' direction

D) 2'-5' direction

Q: Particular amino acid and tRNA molecule bind together by enzyme named: (2019 ETEA)

A) tRNA synthase

B) Amino tRNA synthase

C) tRNA ligase

D) Aminoacyl tRNA synthase

Q: The ribosomes responsible for protein synthesis are present: (2019 ETEA)

A) Floating in cytosol

B) Localized in nucleus

C) Bound to rough ER

D) Both a and c

Q: Enzyme that needs a primer for initiation is: (2019 ETEA)

A) RNA polymerase

B) DNA polymerase

C) Primase

D) Ligase

Q: The following histone proteins form a nucleosome complex except: (2019 ETEA)

A) H1

B) H2A

C) H2B

D) H3

Q: At what phase is the DNA content of a cell doubled: (2020 ETEA)

A) Prophase

B) Interphase

C) Anaphase

D) Telophase

Q: The alternative form of a given gene is called: (2005 ETEA)

A) Dominant

B) Recessive

C) Phenotype

D) Alleles

Q: The alleles that exist in more than two different forms are called: (2005 ETEA)

A) Polygenic alleles

B) Mutagenic alleles

C) Multiple alleles

D) Heterogenic alleles

Q: Law of independent assortment cannot be applied on: (2005 ETEA)

A) Dominant genes

B) Recessive genes

C) Linked genes

D) Autosomal genes

Q: In gene interaction, the gene that masks the expression of another gene is termed as: (2006 ETEA)

A) Hypostatic

B) Epistatic

C) Hemistatic

D) Neostatic

Q: The total of all alleles in a population is called: (2006 ETEA)

A) Genetic drift

B) Genotype

C) Gene pool

D) Gene mutation

Q: On the basis of which of the following ratios can we prove the law of independent assortment: (2006 ETEA)

A) 9:3:3:1

B) 9:3:4

C) 1:2:1

D) 2:1:1