Biology Multiple Choice Questions and Answers for Different Competitive Exams

Multiple Choice Questions on Chromosomes

MCQ on Chromosomes
1. Who coined the term ‘chromatin’ to describe the thread like material of the nucleus?
a) W. Flemming
b) W.Roux
c) E. Strasburger
d) Boveri

2. The haploid set of the chromosomes is called as
a) proteome
b) genomics
c) genome
d) genes

3. The term ‘chromosome (chrom=color, soma=body)’ was coined by

Chromosome
a) W. Flemming
b) W.Roux
c) Waldeyer
d) Sutton

4. The lowest level of chromosome organization is
a) solenoid
b) nucleosome
c) 30nm fibre
d) none of these

5. Which of the following statement is incorrect
a) Chromosome number is constant within individuals in a species in an ecosystem
b) Chromosome number is constant within different species in an ecosystem
c) Chromosome number is constant within different somatic cells of an organism
d) All of these

6. Which of the following has the largest number of chromosome?
Ophioglossum reticulatum chromosome
a) Haplopappus gracilis
b) Ophioglossum reticulatum
c) Pisum sativum
d) Giant redwood tree

7. The number of autosome in humans
a) 44
b) 21 pairs
c) 46
d) 45

8. Which of the following statement is incorrect
a) In human males, there are 44 autosomes and a pair of homomorphic sex chromosomes
b) In human females, there are 44 autosomes and a pair of homomorphic sex chromosomes
c) In human males, there are 44 autosomes and a pair of heteromorphic sex chromosomes
d) In humans, there are 44 autosomes and a pair of sex chromosomes

9. The size of chromosome is measured during
a) prophase
b) metaphase
c) anaphase
d) all of these

10. A chromosome with a very short arm and a very long arm is termed as
different types of chromosomes

a) Telocentric
b) Acrocentric
c) Metacentric
d) Sub-metacentric

11. Chromosome is thickest during
chromosomes at metapahse stage

a) prophase
b) metaphase
c) anaphase
d) interphase

12. A functional chromosome has
a) a centromere
b) a telomere
c) an origin of replication
d) all of these

13. The diagrammatic representation of karyotype (morphological representation of chromosomes) of a species is called
a) Idiogram
b) cladogram
c) ecogram
d) chromogram

14. Euchromatin
a) Genetically active chromatin with genes
b) stains lightly
c) is partially condensed
d) all of these

15. Chromatin has
a) DNA
b) DNA and proteins
c) DNA, RNA and proteins
d) none of these

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Answers
1. a) W. Flemming
2. c) genome
3. c) Waldeyer
4. b) nucleosome
5. b) Chromosome number is constant within different species in an ecosystem
6. b) Ophioglossum reticulatum
7. a) 44
8. a) In human males, there are 44 autosomes and a pair of homomorphic sex chromosomes
9. b) metaphase
10. b) Acrocentric
11. b) metaphase
12. d) all of these
13. a) Idiogram
14. d) all of these
15. c) DNA, RNA and proteins
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