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23
MCQ (Single Correct Answer)

If the sequence of nitrogen bases of the coding strand of DNA in a transcription unit is

$$ 5^{\prime} \text { - A T G A A T G - 3', } $$

the sequence of bases in its RNA transcript would be

A

$5^{\prime}-\mathrm{A} \cup \mathrm{GAA} \cup \mathrm{G}-3^{\prime}$

B

$5^{\prime}-\cup \mathrm{A} \subset \cup \cup \mathrm{A} \mathrm{C}-3^{\prime}$

C

$5^{\prime}-\mathrm{C} \mathrm{A} \cup \cup \mathrm{C} \mathrm{A} \cup-3^{\prime}$

D

$5^{\prime}-\mathrm{G} \cup \mathrm{A} A \mathrm{G} \cup \mathrm{A}-3^{\prime}$

24
MCQ (Single Correct Answer)

The RNA polymerase holoenzyme transcribes

A
the promoter, structural gene and the terminator region
B
the promoter and the terminator region
C
the structural gene and the terminator regions
D
the structural gene only
25
MCQ (Single Correct Answer)

If the base sequence of a codon in $m R N A$ is $5^{\prime}-A \cup G-3^{\prime}$, the sequence of tRNA pairing with it must be

A

$5^{\prime}-\mathrm{UAC}-3^{\prime}$

B

$5^{\prime}-\mathrm{CAU}-3^{\prime}$

C

$5^{\prime}-\mathrm{AUG}-3^{\prime}$

D

$5^{\prime}-\mathrm{G} \cup \mathrm{A}-3^{\prime}$

26
MCQ (Single Correct Answer)

The amino acid attaches to the $t$ RNA at its

A

5'-end

B

3'-end

C

Anti codon site

D

DHU loop

27
MCQ (Single Correct Answer)

To initiate translation, the $m$ RNA first binds to

A

the smaller ribosomal sub-unit

B

the larger ribosomal sub-unit

C

the whole ribosome

D

No such specificity exists