tRNA

Q.

Which is the "only enzyme" that has the "capability" to catalyse initiation, elongation and termination in the process of transcription in prokaryotes?

1. DNA-dependent DNA polymerase

2. DNA ligase

3. DNA-dependent RNA polymerase

4. DNase

Q. Which one is not a stop codon?

1. UAA
2. UAG
3. UCA
4. UGA

Q. Fill in the following blanks with appropriate options.

(A) Information present in the DNA is transcribed in the form of codons in ____(i)______ for protein synthesis.

(B) __(ii)_______is a constituent of ribosomes.

(C) Around 80% of the total cellular RNA is ___(iii)____.

(D) ____(iv)______ carries amino acids to the ribosomes and mRNA to carry out protein synthesis.

1. (i) rRNA, (ii) mRNA, (iii) tRNA,
   (iv) rRNA
2. (i) mRNA, (ii) rRNA, (iii) rRNA,
   (iv) tRNA
3. (i) mRNA, (ii) rRNA, (iii) tRNA,
   (iv) mRNA
4. (i) tRNA, (ii) mRNA, (iii) tRNA,
   (iv) rRNA

Q. The function of tRNA is to transfer from the cytoplasm to the site of protein synthesis.

1. nucleotides
2. RNA
3. DNA
4. amino acids

Q.

What is a triplet of mRNA?

Q.

Differentiate between the followings

(a) Repetitive DNA and satellite DNA

(b) mRNA and t RNA

(c) Template strand and coding strand

Q. The amino acid in a tRNA corresponds to its anticodon or correspond to the nucleotides of coding mRNA ?

Q.

The function of tRNA is_________

1. Production of mRNA

2. Production of microsomes

3. Selection of amino acids

4. Production of ribosomes

Q. What is true about tRNA?

1. It binds with an amino acid at its 3' end
2. It has a codon loop
3. It has a codon at one end which recognises the anticodon on messenger RNA
4. It looks like clover leaf shaped in a three dimensional structure

Q. Where codons and anticodons are present?

Q. What is an anticodon?

1. Paired triplet of bases on messenger RNA
2. Unpaired triplet of bases on rRNA
3. Paired triplet of bases on rRNA
4. An unpaired triplet of bases in an exposed position of tRNA

Q.

Where is the green fluorescent protein used?

Q. Amino acid acceptor arm of tRNA lies at

1. 3’ end
2. 5’ end
3. DHU loop
4. TΨC arm

Q.

What is the function of tRNA in bacteria?

Q. Explain RNA interference.

Q. Amino acid binding site of tRNA is

1. 5' end
2. Anticodon loop
3. DHU loop
4. -CCA 3' end

Q. Assertion :Promotor is said to be located towards $5$'-end of the structural gene. Reason: Promotor is a DNA sequence that provide binding site for DNA polymerase.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. tRNA attaches amino acid at its

1. 3' end
2. 5' end
3. Anticodon
4. Loop

Q. Who suggested clover leaf model of tRNA?

1. Flemming
2. Went
3. Holley
4. Messelson

Q. Match the following.

1. a - 4, b - 2, c - 3, d - 1
2. a - 1, b - 4, c - 3, d - 2
3. a - 1, b - 2, c - 3, d - 4
4. a - 4, b - 3, c - 2, d - 4

Q. The function of tRNA is to transfer from the cytoplasm to the site of protein synthesis.

1. nucleotides
2. RNA
3. DNA
4. amino acids

Q. Amino acid binding site of tRNA has

1. CCA - OH
2. CGA - OH
3. UCA - OH
4. UCG - OH

Q.

Anticodon occurs over:

1. tRNA

2. DNA

3. mRNA

4. rRNA

Q. Cytoplasmic inheritance is also called

1. Maternal inheritance
2. Cytoplasmic association
3. Clonal inheritance
4. None of the above

Q. ‘T’ in T$\psi$ C loop stands for

1. Thymidine
2. Pseudouridine
3. Thymine
4. Ribothymidine

Q. Identify the labelled parts from the following image.

Q. ‘T’ in T$\psi$ C loop stands for

1. Thymine
2. Thymidine
3. Pseudouridine
4. Ribothymidine

Q. Amino acid acceptor arm of tRNA lies at

1. 3’ end
2. TΨC arm
3. 5’ end
4. DHU loop

Q. During protein synthesis amino acids are transported by

1. tRNA
2. mRNA
3. DNA
4. rRNA
5. RNA polymerase

Q. The famous clover leaf model is a representation of:

1. tRNA
2. mRNA
3. rRNA
4. miRNA