BIOLOGY

Question 1

What is the difference between somatic and germline cells?

Answer 1

Somatic cells; CANNOT be inherited
Germline cells: can be INHERITED

Question 2

What is signal sequence?

Answer 2

Portion of the mRNA is located in the 5′ region and will signal to the ribosome that translation needs to be continued in the rough endoplasmic reticulum.

Question 3

What is nuclear localization signal?

Answer 3

sequence that tags the protein for it to be transported into the nucleus.

Question 4

What is Na+/K+ ATPASE used for ?

Answer 4

Na+/K+ ATPASE is used for restoring and maintaining RESTING POTENTIAL (three sodium Out and 2 K+ into cell)

Question 5

What occurs during hyperpolarization?

Answer 5

Hyperpolarization of the cell membrane occurs when K+ channels open and Na+ channels close. This process is independent of the Na+/K+ ATPase

Question 6

What occurs during Depolarization?

Answer 6

Membrane depolarization is due to the opening of Na+ channels, a process that is independent from the Na+/K+ ATPase.

Question 7

What stimulates an action potential ?

Answer 7

release of a neurotransmitter that binds to ligand gated channels

Question 8

How do hydrophobic molecules pass through membrane?

Answer 8

SIMPLE DIFFUSION

Question 9

What happens as a result of ATP Hydrolysis ?

Answer 9

ATP hydrolysis produces ADP and inorganic phosphate.

Question 10

What are lipid rafts?

Question 11

How does the initial filtration step occurr in the glomerulus?

Answer 11

by passive flow due to pressure difference

Question 12

How do enzymes affect reaction rate?

Answer 12

• colocalize substrates
  -alter local pH
• change substrate shape

Question 13

Which phase of cell cycle has NO Division ?

Answer 13

INTERPHASE