MCQ’s Based on Eukaryotic Chromosome for ICAR (SRF or JRF) /ASRB /CSIR NET/BET Exams #1

 

1. The term chromosome was coined by German embryologist
   A) Ernest Hackle
   B) Walter Fleming
   C) Schwann
   D) Schleiden
   Ans: B

2. The chromosomes are composed of
   A) DNA
   B) Histone proteins
   C) RNA
   D) All A, B and C
   Ans: D

3. Sister chromatids are attached at an area called the
   A) Centrosome
   B) Centriole
   C) Centromere
   D) All of the choices are correct
   Ans: C

4. The chromatids of two different chromosomes are called
   A) Sister chromatids
   B) Non-sister chromatids
   C) Chromonemata
   D) Kinetochore
   Ans: B

5. DNA threads of chromosomes are termed as
   A) Chromonema
   B) Plasmodesmata
   C) Chiasmata
   D) Kinetochore
   Ans: A

6. Centromere contains a disc-shaped protein to which the spindle fibers are attached
   A) Chiasmata
   B) Pellicle
   C) Kinetochore
   D) Perkin's Aniline
   Ans: C

7. A pair of morphologically similar chromosomes is known as
   A) Homologous chromosomes
   B) Heterologous chromosomes
   C) X and Y male chromosomes
   D) Both A and C
   Ans: D

8. A _____ is the characteristic chromosome complement of a eukaryote species
   A) Biotype
   B) Cytotype
   C) Karyotype
   D) All of the choices are correct
   Ans: C

9. The most abundant chromosomal proteins are called
   A) Scaffold
   B) Polymerases
   C) Histones
   D) None of these
   Ans: C

10. Highly condensed and transcriptionally inactive DNA form
    A) Heterochromatin
    B) Euchromatin
    C) Autochromatin
    D) Isochromatin
    Ans: A

11. The DNA duplex in a chromosome is coiled around a core of 8 histone proteins every 200 nucleotides, forming a complex called
    A) Nucleosome
    B) Supercoil
    C) Spireme
    D) Kinetochore
    Ans: A

12. “Chromosomes play central role in heredity” was first suggested in 1900 by
    A) Karl Correns
    B) McCarthy
    C) Messelson
    D) Joshua Ryan
    Ans: A

13. The chromosomal theory of heredity was first formulated by
    A) Karl Correns
    B) McCarthy
    C) Messelson
    D) Walter Sutton
    Ans: D

14. Which two scientists proposed the “one gene–one enzyme” hypothesis?
    A) Watson and Crick
    B) Beadle and Tatum
    C) Wilkins and Franklin
    D) Hershey and Chase
    Ans: B

15. The process of gene expression occurs in
    A) Transcription
    B) Translation
    C) Both A and B
    D) Transduction
    Ans: C

16. What kind of enzyme is the telomerase protein?
    A) Terminal transferase
    B) DNA polymerase δ
    C) Reverse transcriptase
    D) RNA polymerase
    Ans: C

17. What is the role of telomerase RNA in telomere replenishing?
    A) Acts as a template
    B) Acts as a primer
    C) Acts as a ribozyme
    D) A and C
    Ans: D

18. What is the role of the DNA strand in telomere replenishing?
    A) Acts as a template
    B) Acts as a primer
    C) Acts as a promoter
    D) Acts as an enhancer
    Ans: B