quiz2

The principle of complementarity governs the process of transcription, except that _______ forms base pair with _______.

• adenosine ; thymine

• thymine ; uracil

• adenosine ; uracil

• cytosine ; uracil

What necessitates defining the boundaries that would demarcate the region and strand of DNA that would be transcribed?

• In transcription, once set in, the total DNA of an organism gets duplicated.

• In transcription only a segment of DNA and only one of the strands is copied into RNA.

• After the completion of transcription, each DNA molecule would have one parental and one newly synthesized strand.

• DNA replicates semi conservatively

Why both the strands are not copied during transcription?

• If both strands act as a template, they would code for RNA molecule with different sequences, which results in different proteins.

• Two RNA molecules if produced simultaneously would be complementary to each other, hence would form a double stranded RNA

• Two RNA molecules if produced simultaneously would be complementary to each other, hence would form a single stranded RNA

• If both strands act as a template, they would code for RNA molecule with identical sequences

The enzyme required for transcription is

• RNA ase

• DNA polymerase

• RNA polymerase

• Restriction enzymes

What is responsible for transcription of tRNA, 5SRrna and snRNA'S?

• RNA polymerase I

• RNA polymerase II

• DNA polymerase I

• DNA polymerase II

What are exons?

• Intervening sequences that do not appear in in mature RNA.

• Polycistronic coding sequence.

• Enzyme that catalyzes transcription

• Sequences that appear in processed RNA.

5' - ATCGCGTA - 3'

Identify whether it is a coding or template strand

• Coding strand

• Template strand.

Consider the following statements. Which of the statements are true?

(a) All the reference point while defining a transcription unit is made with coding strand.

(b) It is the presence of a promoter in a transcription unit that also defines the template and coding strands.

(c) Structural gene in eukaryotes are polycistonic.

• a and b only

• a and c only

• b and c only

• a, b and c

The diagram shows an important concept in the genetic replication of DNA. Fill in the blanks A to C.

• A - Transcription,

  B - Replication,

  C - Translation

• A - Replication,

  B - Transcription,

  C - Translation

• A - Translation,

  B - Transcription,

  C - Replication

• A - Translation,

  B - Transcription,

  C - Replication

If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence?

• TTAGU

• UAGAG

• AACTG

• ATCGU