The amino acid acceptor arm of the tRNA is at its:

(1) DHU loop

(2) TψC loop

(3) 5' end

(4) 3' end

 

Concept Questions :-

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Which of the following codons has a dual role in the genetic code?

(1) AUG

(2) GUG

(3) CUG

(4) UUG

 

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What is the major difference between the lagging and leading strands during DNA replication ?

(1) On the leading strand, DNA synthesis occurs from 5' to 3', while DNA synthesis occurs from 3' to 5' on the lagging strand.

(2) DNA polymerase is able to continuously add new nucleotides on the leading strand while it must keep 'starting over' on the lagging strand.

(3) The lagging strand requires only a single primer while the leading strand requires many.

(4) Helicase opens the leading stran at a faster rate than the lagging strand.

 

Concept Questions :-

DNA Replication:III
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A tRNA molecule must :

(1) have a base sequence identical to the codon in the mRNA

(2) be attached to a particular amino acid

(3) bind to the protein to determine its primary structure

(4) All of these

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The inducer of lac operon is :

(1) Beta galactosidase

(2) Galactose

(3) Lactose

(4) Glucose

Concept Questions :-

Gene Regulation:Lac Operon
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The creation of a DNA fingerprint would normally employ all the following techniques except :

(1) Southern blotting

(2) Use of restriction endonucleases

(3) Gel electrophoresis

(4) Western blotting

Concept Questions :-

DNA Fingerprinting
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In eukaryotes which of the following is removed from initially transcribed RNA before it is transported to the cytoplasm for translation ?

(1) Intron

(2) 3' Poly A tail

(3) Ribosome binding site

(4) 5' cap

Concept Questions :-

Transcription: IV
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regulatory domains of most activators interact with

(1) the transcription factor complex

(2) RNA polymerase

(3) repressors

(4) the DNA binding domain

Concept Questions :-

Transcription: IV
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VNTR are useful in DNA profiling because they:

I. Are hypervariable

II. Are inherited

III. Synthesize constitutive enzymes

(1) I, II and III are correct

(2) I and II are correct

(3) I and III are correct

(4) II and III are correct

Concept Questions :-

DNA Fingerprinting
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DNA chemically is less reactive and structurally more stable than RNA. Therefore,

1. DNA has evolved from the RNA

2. RNA can directly code for proteins

3. DNA is the better genetic material than RNA

4. The protein synthesizing machinery has evolved around RNA

Concept Questions :-

DNA vs RNA as Genetic Material
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