Nextstep 3 Biochem

Question 1

Phosphatase usually does? Whereas kinases?

Answer 1

Inhibits

Kinases activate

Question 2

Electrons carriers can be?

Answer 2

Mobile and hydrophobic or immobile and water soluble.

Question 3

During hyperventilation?

Answer 3

CO2 is lost and increased O2 happens. Loss of CO2 increases blood pH. Loss of CO2 is related to increased hemoglobin affinity for O2

Question 4

What’s the definition of a lysogenic virus?

Answer 4

Lysogenic viruses alter nuclear DNA, but it not activated for several generations.

Question 5

Triglycerides are composed of?

Answer 5

One glycerol molecule and three fatty acids.

Question 6

Adenine and Guanine are?

Whereas thymine and cytosine are?

Answer 6

Purines two ring structures

Pyrimidines sing ring structures

Question 7

Sn2 are favored by?

Answer 7

Polar aprotic solvents such as acetone or DMSO.

Question 8

What is the kinectic energy of a photoelectron produced in the energy meter of a PAC devise when the frequency of an incident photon that is not absorbed is f=5•10^15 Hz and h= 4.1•10^-15eVs

detector work function equals to 3.4eV

Answer 8

You have to take into account the work utilized by the detector as well

5•10^15 Hz 4.1•10^-15eVs - 3.5eV = 17.1 eV

Question 9

SN1 type of substitutions are most likely to happen when?

Answer 9

On the most stable (tertiary) carbocations.