ACE Your Biology Exam - Biology Mock Test About RNA And Protein Synthesis

128 Questions | By Themes | Last updated: Mar 21, 2022 | Total Attempts: 200

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ACE Your Biology Exam - Biology Mock Test About RNA And Protein Synthesis - Quiz

Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation. Transcription is the transfer of genetic instructions in DNA to mRNA in the nucleus. It includes three steps: initiation, elongation, and termination. Ace Your Biology Exam by passing Biology Mock Test about RNA and Protein Synthesis

Questions and Answers

1.

What are the missing nucleotides (1), (2), (3) and (4) respectively in the following figure?
- A.
  
  U – A – C – G
- B.
  
  A – A – C – G
- C.
  
  A – U – G – C
- D.
  
  A – A – G – C
2.

Bacteria produce ---------- when infected by a Bacteriophage.
- A.
  
  Restriction enzymes then ligase enzymes
- B.
  
  Modified enzymes then polymerase enzymes
- C.
  
  Restriction enzymes then modified enzymes
- D.
  
  Modified enzymes then restriction enzymes
3.

What is the number of nucleotides of a DNA molecule that contains two complete turns?
- A.
  
  10
- B.
  
  20
- C.
  
  30
- D.
  
  40
4.

The maximum number of different genetic codes for amino acids on mRNA is …...
- A.
  
  3
- B.
  
  20
- C.
  
  61
- D.
  
  64
5.

For the formation of a protein consists of 300 amino acids, then the number of turns of the DNA molecule which is going to be transcribed is ……
- A.
  
  30
- B.
  
  90
- C.
  
  15
- D.
  
  45
6.

The pores in the nuclear membrane transfer -------- to the cytoplasm
- A.
  
  Ribosomes
- B.
  
  tRNA
- C.
  
  mRNA
- D.
  
  All the previous
7.

The ------- is responsible for reading the language of the amino acids and nucleotides.
- A.
  
  Transfer RNA
- B.
  
  RNA polymerase
- C.
  
  Messenger RNA
- D.
  
  Ribosome
8.

The codon is three successive nucleotides found on ……….
- A.
  
  DNA
- B.
  
  Messenger RNA
- C.
  
  Transfer RNA
- D.
  
  Ribosome
9.

A recombinant DNA molecule is produced by .....
- A.
  
  Joining of two DNA fragments of the same organism.
- B.
  
  Joining of more than two DNA fragments of the same organism.
- C.
  
  Joining of two DNA fragments originating from different organisms.
- D.
  
  Joining two mRNA molecules.
10.

Which of the following statements are true regarding recombinant-DNA technology?
- A.
  
  Is used to obtain large number of copies of specific DNA fragments
- B.
  
  Is used to obtain large quantities of the protein produced by the concerned gene
- C.
  
  Is used to integrate gene of interest into chromosomes where it expresses itself
- D.
  
  All of them
11.

Which of the following enzymes in bacteria are responsible for restricting the growth of viruses?
- A.
  
  Reverse transciptase
- B.
  
  Restriction endonuclease
- C.
  
  Peptidyl transferase
- D.
  
  Ligases
12.

Which enzyme is used to join together two different types of DNA molecules?
- A.
  
  Ligase
- B.
  
  Endonuclease
- C.
  
  Gyrase
- D.
  
  Peptidyl transferase
13.

How many DNA double strands are obtained from one DNA double strand after 4 cycles in PCR?
- A.
  
  4
- B.
  
  8
- C.
  
  16
- D.
  
  32
14.

At what temperature do denaturation of DNA double helix takes place in the PCR?
- A.
  
  60˚
- B.
  
  54˚
- C.
  
  74˚
- D.
  
  94˚
15.

At what temperature do annealing of DNA and primer takes place in PCR?
- A.
  
  42˚
- B.
  
  54˚
- C.
  
  74˚
- D.
  
  96˚
16.

Which of the following is a mismatch?
- A.
  
  Polymerase – Taq polymerase
- B.
  
  Template – double stranded DNA
- C.
  
  Primer – small number of nucleotides
- D.
  
  Synthesis – 5’ to 3’ direction
17.

Which of the following is true about DNA hybridization and species relatedness?
- A.
  
  The more similar the DNA, the higher the DNA melting temperature
- B.
  
  The less similar the DNA, the more hydrogen bonds will be formed
- C.
  
  Unrelated species are more likely to share genetic similarities
- D.
  
  Only species living in the same region will have similar DNA
18.

Which of the following is a use for DNA hybridization?
- A.
  
  To look for species' relatedness
- B.
  
  To look for changes in gene expression
- C.
  
  To understand the mechanisms of evolution in isolated populations
- D.
  
  To decrease genetic mutation in a population
19.

Conversion of messages carried by mRNA into amino acid sequences is called________.
- A.
  
  Replication
- B.
  
  DNA repair
- C.
  
  Translation
- D.
  
  Transcription
20.

Name the suppressor which blocks translation in eukaryotes?
- A.
  
  Stop codon
- B.
  
  Releasing factor
- C.
  
  Terminator
- D.
  
  Poly-adenine tail
21.

A section in the nucleic acid marks the end of a gene during transcription process .....
- A.
  
  Promoter
- B.
  
  Terminator
- C.
  
  Releasing factor
- D.
  
  RNA polymerase
22.

What is the role of mRNA in protein synthesis?
- A.
  
  It translates genetic code to a specific amino acid.
- B.
  
  It modifies mRNA molecules prior to protein synthesis.
- C.
  
  It provides a genetic map for the protein.
- D.
  
  It catalyzes the process.
23.

What is the role of the r-RNA in protein synthesis?
- A.
  
  It translates genetic code to a specific amino acid.
- B.
  
  It modifies mRNA molecules prior to protein synthesis.
- C.
  
  It provides a genetic map for the protein.
- D.
  
  It catalyzes the process.
24.

Protein synthesis refers to the ......
- A.
  
  Process of formation of amino acids directly from a DNA template.
- B.
  
  Process of formation of mRNA from DNA template.
- C.
  
  Process of formation of amino acids from mRNA.
- D.
  
  Process of duplicating DNA required for protein synthesis.
25.

Peptide bond formation between amino acids of growing polypeptide chain is catalysed by .....
- A.
  
  Peptidyl transfrase
- B.
  
  Amino acyl-tRNA synthetase
- C.
  
  Peptide polymerase
- D.
  
  Peptidyl synthetase

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