1. Smallest genome size is seen in
a) E.coli b) Helicobacter pylori c) Carsonella ruddii d) Saccharomyces cerevisiae
2.
Which human chromosome has the highest number of genes?
a) X chromosome b) Chromosome 1 c) Y chromosome d) Chromosome 8
3.The haploid chromosome number of Rice is
a)10 b)11 c)12 d)13
4.
Covid 19 genome is
a) Single stranded RNA
b) Double stranded RNA
c) Single stranded DNA
d) Double stranded DNA
5.
Mendel, after his experiments with the garden pea, continued his experiments
with:
a)
Drosophila and Neurospora
b)
Honey bee and Neurospora
c)
Heiracium and honey bee
d) Drosophila and honey bee
6.
Albinism is a congenital human disorder resulting from the lack of the enzyme
a) Catalase
b) Fructokinase
c) Tyrosinase
d) Xanthine oxidase
7. The starting t-RNA of
prokaryotes is loaded with
a) Valine
b) Methionine
c) Formylated Methionine
d) Tryptophan
8. Gene-battery model" of
gene regulation in eukaryotes is proposed by
a) Jacob
and Monod
b) Britten and Davidson
c) Beadle
and Tatum
d) Kornberg and Ochoa
9. The enzyme that removes the
RNA-primer after DNA replication is
a) DNA polymerase-I
b) DNA
polymerase-II
c) Ligase
d) Gyrase
10. DNA replication occurs in
a)𝐺1 phase
b)𝐺2 phase
c)S-phase
d) Interphase
11. A nucleosome is made of
a) DNA
b) Histone
c) Histone
wrapped over octameric core of nucleic acid
d) DNA wrapped over octameric core of histone
12. Degeneration of genetic code is attributed to the
a) First
member of codon
b) Second
member of codon
c) Entire
codon
d)Third member of codon
13. In split genes, the coding sequences are called
a)Introns
b)Operons
c)Exons
d)Cistrons
14)Genes
which confer antibiotic resistance on bacteria are located on
a)Chromosomal
DNA
b)Plasmid
c)RNA
d)Polysome
15. Suggest
the number of phenotypes possible in a test cross of AABBCcDD if there is
complete dominance
a)
Four
b)
Six
c)
Two
d) Eight
16. Phenotypic and genotypic F2 ratio
remains the same in:
a)
Intermediate dominance
b) Co
dominance
c)
Overdominance
d) Dominant epistasis
17.Which among the following is a
codominant marker?
a)
RAPD
b)
AFLP
c)
STMS
d) AP PCR
18. In Snapdragon the Red
flower colour is incompletely dominant over White with the heterozygous
producing Pink flowers. Tall plant is completely dominant over Dwarf. If a
cross between two shapdrageons produced Tall Red, Tall Pink, Dwarf Red and
Dwarf Pink in the ration 3:3:1:1, predict the genotypes of the parents.
a)
TtRR X TtRr
b)
TTRr X TtRr
c)
Ttrr X TtRr
d)
TTrr X TtRr
19. Genomic imprinting is
a) Expression of genes depend on its paternal or maternal
inheritance
b) Expression of genes linked with X chromosomes
c) Expression of genes linked with Y chromosomes
d) Expression of extrachromosomal genes
20. Genes with intervening sequences
a) Introns
b) Split genes
c) Exons
d) Pseudo genes
Learn more: Topic wise MCQ on Genetics
Answers:
1. c) Carsonella ruddii
2. b) Chromosome 1
3. c)12
4. a) Single stranded RNA
5. c) Heiracium and honey bee
6. c) Tyrosinase
7. c) Formylated Methionine
8. b) Britten and Davidson
9. a) DNA polymerase-I
10. c)S-phase
11. d) DNA wrapped over octameric core of histone
12.d)Third member of codon
13. c)Exons
14.b)Plasmid
15. c) Two
16. a) Intermediate dominance
17.c) STMS
18. a) TtRR X TtRr
19. a) Expression of genes depend on its paternal or maternal inheritance
20. b) Split genes
