Chromosome and DNA in Biology topic based MCQs preparation test for all competitive exam. Chromosome and DNA in Biology Chapter# 16, topic based MCQs that are mostly asked in competitive exam related to Biology. Examtry team design a series of MCQs based tests that effectively and efficiently help a student or job seeker to prepare their exam effectively and efficiently.
Examtry team design more than 40 MCQs and try their best to cover the whole topic Chromosome and DNA in Biology . These MCQs based test really helpful in all competitive exams as well as institutional exams. Anyone who wants to pass job test comprising one paper or MCQs based test come on examtry.com and get prepared himself.
MCQs under the topic of Chromosome and DNA in Biology covers all tests conducted by FPSC, NTS, KPSC, PPSC, SPSC, BPSC, OTS, UTS, UPS, PTS, CTS, ATS, ETEA or any other institution.
1 - Which is incorrect?
1st evidence of hereditary nature of DNA provided by Friedrich Meischer
2 - Chromosome is made of
2 chromatids +1 centromere +secondary constriction
3 - Chromosomes are composed of
60% protein and 40% DNA
4 - A typical human chromosome contains _________ nucleotides in its DNA
140 million
5 - Histones have abundance of amino acids
Arginine and lysine
6 - A tortion of chromatin that is condensed only during cell division is
Euchromatin
7 - Transfer of genetic material from one cell to another that can alter the genetic makeup of recipient cell is called
Transuction
8 - DNA contains
Purines (A and G) pyrimidines (T and (c)
9 - In DNA
Both a and b
10 - DNA has a helical shape with the diameter of
2 nm
11 - In semi-conservative replication
Sequence of original duplex is conserved after one round of replication
12 - The true E.Coli replicating enzyme is
DNA polymerase III
13 - Rate of DNA replication by DNA polymerase is
1000 nucleotides / sec
14 - Which statement is correct?
Lagging strand is constructed discontinuously.
15 - The length of okazaki fragments in eukayotes is
100-200 nucleotides
16 - In alkaptonuria
Both a and b
17 - The sequence of nucleotides that determines the amino acid sequence of a protein is
Gene
18 - Central dogma is
Basic mechanism of reading and expressing genes
19 - In prokaryotes there are
Both a and b
20 - Human cell contains ______ different kinds of tRNA molecules
45
21 - In eukaryotes newly synthesized mRNA
Both a and c
22 - Which 3 codons are nonsense codons?
UGA,UAG,UAA
23 - Methionine is specified by
Both b and c
24 - In mitochondria UGA is/specifies as
Tryptophan
25 - Three nucleotide sequence on tRNA that specifies an amino acis is
Anticodon
26 - Initiation complex in translation is composed of
Ribosome and aminoacyl-tRNA
27 - Examples of chromosomal aberrations are
Both a and b
28 - Point mutations are represented as
Alteration in sequence of DNA nucleotide
29 - Strand of DNA which is not transcribed is called
Coding
30 - Phenylketonuria is due to deficiency of
Phenylalanine hydroxylase
31 - Molecular basis of sickle cell anaemia was found by
Vernone Ingram
32 - Which is incorrect about nucleosome
8 histones as acidic proteins
33 - Sex chromosomes were 1" discovered in
Fruitfly
34 - A sugarcane cell has _________ chromosomes.
80
35 - Centromere represents
Primary constriction
36 - Wich of the following cal kill mice if injected separately?
Live S type pneumococcus
37 - X-Ray diffraction pattern of DNA was prepared by
Rosalind Franklin
38 - In sickle cell Hb, which chain is affected?
Beta Chain
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