Exam 3

Question 0

In the Calvin cycle, the enzyme that catalyzes the capture of carbon dioxide and results the formation of 3-phosphoglycerate is?

Answer 0

Ribulose bisphosphate carboxylase/ oxygenase(rubisco).

Question 1

Where does the Calvin cycle take place?

Answer 1

Stroma of the chloroplast

Question 2

Location of the chlorophyll based photocenters?

Answer 2

Thylakoids membrane

Question 3

Location some reactions of photo respiration pathway?

Answer 3

Peroxisomes

Question 4

Location of sucrose synthesis?

Answer 4

Cell cytoplasm

Question 5

Location of relatively high proton concentrations?

Answer 5

Thylakoids lumen

Question 6

The “KDEL” tag, with amino acids Lysine-aspartate-glutamate-leucine at the carboxyl end of a soluble protein, leads to?

Answer 6

The binding to a receptor in the Golgi cis-sacs and vesicles return to the ER.

Question 7

The addition and modification of mannose-6-phosphate oligosaccharide chains to soluble lysosomal enzymes leads to?

Answer 7

Sorting of enzymes into transport vesicles that eventually form lysosomes

Question 8

Suppose the thylakoids sacs isolated from chloroplasts were made acidic and the transferred in the dark to a pH 8 solution. What would be likely to happen?

Answer 8

The isolated thylakoids sacs will make ATP

Question 9

Which of the following is common in both cellular respiration and the light reactions of photosynthesis?

Answer 9

The chemiosmotic formation of ATP

Question 10

Photorespiration occurs when rubisco enzyme catalyzes the reaction of ribulose bisphophate with?

Answer 10

O2

Question 11

The continuous release of mucus by the epithelial cells lining the respiratory tract is an example?

Answer 11

Constitutive secretion

Question 12

List the order in which the protein of these fractions first exhibit radioactivity?

Answer 12

III, II, I, out of the cell

Question 13

All of the following statements about cellular trafficking are true except?

Answer 13

COPI-coated vesicles move materials from Golgi to the secretory vesicle

Question 14

Structure that biosynthesis of steroid hormones?

Answer 14

Smooth ER

Question 15

Structure that degradation of damaged organelles?

Answer 15

Lysosomes

Question 16

Sorting proteins for export or to specific organelles

Answer 16

Golgi apparatus

Question 17

Transport to or between various layers of Golgi

Answer 17

Shuttle transition vesicle

Question 18

Uptake of low-density lipoproteins LDL occurs by?

Answer 18

Receptor-mediated endocytosis?

Question 19

What are C4 plants more suited to hot climates than C3 plants?

Answer 19

They keep fixing carbon dioxide even when the stomata of the leaf are closed, due to CO2 pump.

Question 20

The source of most of the O2 gas in the atmosphere is due to oxidation of water by Cyanobacteria, algae and plants.

Answer 20

True

Question 21

Ultimately, the -66 mV resting potential of many nerve cells is established by what process?

Answer 21

The work of Na+\K+ pumps

Question 22

A toxin that binds and closes only voltage-gated sodium channels in axons would be expected to

Answer 22

Prevent the depolarization phase of the action potential

Question 23

One of the first things that happens in post-translational modification of most proteins in the rough ER is?

Answer 23

Addition of carbohydrate chains (glycosylation)

Question 24

CAM plants keep stomata closed in daytime, and open them at night, thus potentially reducing loss of water. They can do this because they?

Answer 24

Fix CO2 into organic acids like malate held in vacuoles during the night

Question 25

One of the disadvantages of the C4 pathway is that it requires more_______ to run a carbon dioxide shuttle than the pathway of C3 plants.

Answer 25

More ATP

Question 26

Peroxisomes have all of the following functions in animal cells EXCEPT?

Answer 26

Fusing with phagocytic vacuoles to digest bacteria?

Question 27

MS is an autoimmune disease that attacks myelinated nerves and degrades Schwann cells and the myelin sheath around them. This would affect nerve cells by?

Answer 27

All of the above

Question 28

The order of events in the formation of clathrin-coated vesicles includes all the following steps EXCEPT?

Answer 28

Movement of cell membrane to surround molecules or particles.

Question 29

The proximal stimulus for secretion of neurotransmitters into the synaptic cleft is in increase in?

Answer 29

Calcium levels

Question 30

At rest, most cells have relatively high concentrations of________ outside the cell compared to inside the cell, leading to a relatively________ charge inside the cell compared to its environment.

Answer 30

Sodium; negative

Question 31

You are looking for lysosomes, the enzyme activity you can test for is?

Answer 31

Lipases and protein hydrolases

Question 32

The faster, salutatory transmission of signals in nerve axons is made possible by?

Answer 32

Nodes of ranvier Myelin sheaths

Question 33

The “information receiving” section of a neuron is its_____?

Answer 33

Dendrites

Question 34

The main inputs for the Calvin cycle are_______; the immediate main output carbohydrate is_________?

Answer 34

ATP, CO2, NADPH; G-3-P