During initial transcription, the active center of RNA polymerase is translocated forward relative to the DNA template and synthesizes short transcripts before aborting, then repeats this cycle until it escapes the promoter. Three models have been proposed to account for this;

i. Polymerase moves along the DNA.

ii. The front part of the enzyme moves along the DNA, but because of a flexible region within the enzyme, the back part of the enzyme can remain stationary at the promoter.

iii. The enzyme remains stationary and pulls the DNA into itself.

TLS Online TPP Program

#Question id: 34184

#Unit 3. Fundamental Processes

Which of the following is incorrect option

TLS Online TPP Program

#Question id: 34185

#Unit 3. Fundamental Processes

What is the order of proteins from replication fork to origin on leading and lagging strand if

A. helicase   B. Primase C. Polymerase

TLS Online TPP Program

#Question id: 34186

#Unit 3. Fundamental Processes

A. Each Okazaki fragment is synthesized by a new alternating core polymerase.

B. When synthesis of one Okazaki fragment is completed, synthesis of the next Okazaki fragment starts close to fork

C. Each Okazaki fragment is synthesized by a new primer reaction

D. Bonafide Okazaki fragments size is conserved among prokaryotes to eukaryotes

Choose true and false

TLS Online TPP Program

#Question id: 34187

#Unit 3. Fundamental Processes

The end replication problem of prokaryotes is

TLS Online TPP Program

#Question id: 3848

#Unit 3. Fundamental Processes

are small molecules that function as adapters between amino acids and codons.

TLS Online TPP Program

#Question id: 3849

#Unit 3. Fundamental Processes

Which of the following is short 20 to 22-nucleotide single-stranded RNAs that block the expression of complementary or partially complementary mRNAs.