BOTANY : Cell & Molecular Biology 2

🟥 BOTANY : Cell & Molecular Biology 2

🟥 QUESTIONS :25

🟥 TIME : 20 MINS

1 / 25

1)

TATA boxes and pribnow boxes are component of
-

A) Operators

B) - Promoters -

C) Enhancers

D) Activators

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2)

: RNA contains repeating units of _______ ]
-

A) Deoxyribonucleotides -

B) Ribonucleotides -

C) Deoxyribonucleoside -

D) Ribonucleoside

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3) Which of the following enzyme is nonproteinaceous

A) - Deoxyribonuclease

B) - Ligase -

C) Ribozyme

D) - Lysozyme

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4)

Which of the following rRNA in bacteria act as a ribozyme as well as structural RNA
-

A) 23 SrRNA -

B) 18 SrRNA -

C) 5.8 SrRNA

D) - 5 SrRNA

5 / 25

5)

: Anticodon is present in ________ ]
-

A) DNA

B) - tRNA

C) - rRNA -

D) mRNA

6 / 25

6)

Nucleotides in RNA are linked by
-

A) Glycosidic bond -

B) Phosphodiester bond -

C) Both -

D) None of these

7 / 25

7) Which of the following RNAs are the most abundant in an animal cell

A) mRNA

B) tRNA

C) miRNA

D) rRNA

8 / 25

8) A single strand of mRNA attached to complex of ribosomes is called

A) Okazaki fragments

B) polymer

C) polysome

D) polypeptide

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9)

rRNA found in prokaryotic ribosome LSU (larger sub unit), SSU (smaller sub unit)
-

A) 28s and 5s in LSU ,15s in SSU

B) - 23s and 5s in LSU ,16s in SSU

C) - 28s,5s and 5.8s in LSU ,18s in SSU

D) - 23s and 5s in LSU,18s in SSU

10 / 25

10)

: The RNA in the cell with gretest sequence diversity is
🙌

A) - Messenger RNA -

B) Ribosomal RNA -

C) Transfer RNA

D) - A and C

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11) During the overall process of protein synthesis aminoacid become covalently attached to

A) - Messenger RNA -

B) Ribosomal RNA -

C) Transfer RNA -

D) More than one of the above

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12)

Which of the following is not the unusual base present in tRNA?
-

A) Dihydrouridine -

B) Pseudouridine -

C) 5 methyluracil -

D) 4 thiouridine

13 / 25

13) Ribosomes are made up of

A) DNA & protein

B) DNA alone

C) RNA & DNA

D) RNA & protein

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14) Chromatin mainly consist of

A) DNA

B) RNA

C) RNA & Histone

D) DNA & Histone

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15) Poll : Who was the first person to observe the chromosome- Fleming

A) - Waldeyer

B) - Hofmeister -

C) Strausburger

16 / 25

16)

: Chromosome were first observed on the pollen mother cells of
-

A) Acetabularia

B) - Ophiorrhiza -

C) Tradescantia -

D) Haplopappus

17 / 25

17)

: Which of the following is not a function of telomere ]
- Prevent end to end fusion of chromosomes
- Protection of chromosome from nuclease
- Formation of spindle fibres
- Cell wall formation
-

A) B&C - C

B) c -only -

C) C& D - B,

D) C &D

18 / 25

18)

Which of the following amino acids are absent in histone proteins
-

A) Arginine

B) - Lysine -

C) Tryptophan -

D) A& B

19 / 25

19)

Presence of plasma gene was first noticed by
-

A) Winkler

B) - Carl Correns -

C) Richard Alltman

20 / 25

20)

Histone ratio in a chromosome is 1:2:2:2:2. 1 denotes
-

A) H1

B) - H2

C) - H3 -

D) H4

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21)

The term plasma genes given by
-

A) Richard altman -

B) Carl correns -

C) Winkler

D) - Heitz

22 / 25

22)

Number of genes present in mtDNA
-

A) 120 -

B) 35 -

C) 37

D) - 22

23 / 25

23)

Satellite DNA naming by
-

A) Heitz -

B) Navashin -

C) Watson & Crick -

D) Waldeyer

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24)

Which of the following is not among the three major events mentioned in Endosymbiosis theory of Altman
-

A) Loss of many genes of invader -

B) - Inheritance of some gene from hostgenome to organelle -

C) Transfer of some genes to nuclear gene of host

D) Retention of still other genes with in the organelle

25 / 25

25)

Where does spindle fibers attach during metaphase
-

A) Kinetochore of the chromosome --

B) Kinetosome of the chromosome -

C) Centromere of the chromosome

D) Telomere of the chromosome

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BOTANY : Cell & Molecular Biology 2

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