Question Which of the following structure(s) contains genetic information that i

Question

Question

Which of the following structure(s) contains genetic information that is capable of producing a functional protein? Choose all that apply.

A

B

C

D

E

F

QUESTION

What enyzmatic activity, in addition to synthesizing DNA, is associated with DNA polymerase III that allows it to correct mistakes that occured during the process of replication?

proofreading

insertnuclease

fidelity

processivity

QUESTION

Name 1 difference and 1 similarity between Sec-mediated secretion and Type I secretion . Make sure you provide enough detail to your answer -- whenever possible don't just say that one does this and the other does not.

Difference:

Similarity:

  

QUESTION

During DNA replication, one strand is synthesized continuously, while synthesis of the other strand is made in spurts calledOkazaki fragments.

What three enzymes are needed to complete the synthesis of the lagging strand by removing patches of RNA primers, filling in the gaps with DNA sequence and sealing the gaps?

RNaseH

DNA polymerase I

Helicase

Ligase

Topoisomerase I

Gyrase

Primase

DNA polymerase III

1 points   

QUESTION 18

fill in the blank

During SRP-mediated secretion, an N-terminal ________ found on a newly synthesized or ________ polypeptide is recognized by SRP, which is a complex between a protein called  and a sRNA called __________. The binding of SRP to the SS causes the ribosome to stall and the entire complex is moved closer to the cell membrane. Since the process of synthesizing the protein and its insertion into the membrane is coupled, this entire process is called ___________ . Some proteins can insert themselves into the membrane without the assistance from other proteins. However, in other situations, the SRP complex delivers the growing protein to a membrane-associated shuttle protein called ___________, which brings the SRP to a complex called the _______________ translocon.

QUESTION

At what site in the DNA sequence does synthesis of the mRNA transcript begin?

the -1

the AUG

the +1

the ribosome binding site

the oriC

QUESTION 20

Which of the following factors is needed for successful termination of DNA replication? Choose all that apply.

Tus proteins

DNA pol I

ter DNA sequence

release factor

RNase H

topoisomerase IV

A

B

C

D

E

F

Explanation / Answer

1st question, incomplete information

2. Proofreading activity helps DNA polymerase III to correct mistakes during replication.

3. DIFFERENCE:Type I secretion system also known as T1SS or TOSS. this is a chaperone dependent secretion system employing Hly and ToI gene clusture. sec-mediated secretion system is a Type II secretion system. it requires a N-terminal signal peptide for secretion.

SIMILARITY: both of the secretion systems can transport proteins. and are very specific. T1SS can transport drugs as well.

4. During lagging strand synthesis, RnaseH removes the primer, DNA pol I fills the gaps with DNA sequence and ligase seals the gap between two adjacent nucleotides.

5. transcriptio of mRNA starts at -1 sequence of DNA. It is known as promoter site where RNA polymerase binds and starts transcription.

20. Tus proteins bind to Ter sequence during termination of DNA replication.

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