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Question-1
Haploids are able to express both recessive and dominant alleles/mutations because there are
(A)
many alleles for each gene
(B)
two alleles for each gene
(C)
only one allele for each gene in the individual
(D)
only one allele in a gene.
Question-2
In Drosophila the XXY condition leads to femaleness whereas in human beings the same condition leads to Klienfelter’s syndrome in male. It proves
(A)
in human beings Y chromosme is active in sex determination
(B)
Y chromosome is active in sex determination in both human beings and Drosophila
(C)
in Drosophila Y chromosome decides femaleness
(D)
Y chromosome of man have genes for syndrome
Question-3
Khorana first deciphered the triplet codons of
(A)
serine and isoleucine
(B)
cysteine and valine
(C)
tyrosine and tryptophan
(D)
phenylalanine and methinonine
Question-4
During DNA replication, the strands separate by
(A)
DNA polymerase
(B)
topoisomerase
(C)
unwindase/helicase
(D)
gyrase
Question-5
The process of translation is
(A)
ribosome synthesis
(B)
protein synthesis
(C)
DNA synthesis
(D)
RNA synthesis
Question-6
A family of five daughter only is expecting sixth issue. The chance of its beings a son is
(A)
Zero
(B)
25%
(C)
50%
(D)
100%.
Question-7
Genetic code consists of
(A)
adenine and guanine
(B)
cytosine and uracil
(C)
cytosine and guanine
(D)
all the above
Question-8
In split genes, the coding sequences are called
(A)
exons
(B)
cistrons
(C)
introns
(D)
operons
Question-9
The process of transfer of genetic information from DNA to RNA/formation of RNA from DNA
(A)
transversion
(B)
transcription
(C)
translation
(D)
translocation
Question-10
The transforming principle of
pneumococcus
as found out by Avery, MacLeod and McCarty was
(A)
mRNA
(B)
DNA
(C)
protein
(D)
polysaccharide.
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Plus 2 Biology Science
CBSE
Practice in Related Chapters
Plant Reproduction
Animal Tissue
Kingdom Monera
Plant Kingdom
Biological Classification
General Biology
Respiratory System
Digestive System And Nutrition
Circulatory System and Immunity
Plant Morphology
Plant Anatomy
Cell Reproduction
Human Genetics & Genetic Disorders
Mendelian & Postmendelian Genetics
Genes & Chromosomes
Biomolecules
Enzymes
Cell Respiration
Cell Respiration
Kingdom Fungi
Aging And Death
Common Human Diseases
Evolution
Drug And Addiction
Reproduction And Embryonic Development
Endocrine System
Excretion And Osmoregulation
Nervous System & Sense Organs
Musculo-Skeletal System
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