Question

1. What would you predict to be the consequence on DNA replication if the cell had a non-functional primase protein?

A. There would be no leading strand made.

B. There would be no lagging strand made.

C. There would be gaps in the leading strand.

D. There would be gaps in the lagging strand.

E. Two of the above are true.

2. During a laboratory experiment, you discover that an enzyme-catalyzed reaction has a ∆G of -20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the ∆G for the new reaction?

A. -40 kcal/mol

B. -20 kcal/mol

C. +20 kcal/mol

D. 0 kcal/mol

E. +40 kcal/mol

3. Which of the following elements are needed for chromosome separation during mitosis or meiosis?

A. intermediate filaments

B. extra cellular matrix

C. actin

D. microtubules

4. One of the major categories of receptors in the plasma membrane reacts by forming dimers, adding phosphate groups, and then activating relay proteins. What type of receptor is this?

A. ligand-gated ion channel

B. receptor tyrosine kinase

C. G-protein coupled receptor

D. steroid hormone receptor

5. Taxol is a anti-tumor drug and prevents microtubules from disassembly. What cell process is it most likely to affect?

A. it prevents metastasis by inhibiting cell movement

B. it acts as a S to G2 inhibitor of the cell cycle

C. it prevents cell division, during M phase

D. in acts in two of the above processes

6. A scientist generates an electron micrograph of part of an organism that shows a gene that is being transcribed, with the transcript containing multiple ribosomes that are translating it. Which of the following statements must be TRUE about this organism?

A. this organism is a eukaryote

B. there is not enough information to tell if this organism is a prokaryote or a eukaryote

C. this organism is a prokaryote

D. this organism could be either a prokaryote or a eukaryote

Answer 1

Ans-1- primase is required for lagging and leading strand synthesis but lagging strand needs so many primase. So if primase is non-functional, lagging strand synthesis would be hampered. Option B is correct.

Ans-2- delta G of a reaction doesn't changes. Option B is correct

Ans-3- microtubules

Ans-4- receptor tyrosine kinase

Ans-5- it prevent cell division during M phase

Ans-6- single mRNA bound with multiple ribosomes is known as polyribosome and it is present in both prokaryotes and eukaryotes.

Option D is correct