Question

1. The polarized interstitial cells that line the gut use two types of glucose transporters; a uniporter located at the basal surface and a co-transporter that is located at the apical surface. Why do these cells need both types of transporters? In other words, how do they function together during during the process of absorbing glucose into the body?

2.

In the citric acid cycle, the acetyl group from acetyl-CoA joins _____________ to generate ____________.

a. Malate, oxaloacetate b. Succinate, malate c. Oxaloacetate, citrate

d. Succinate, oxaloacetate

e. Pyruvate, citrate

3. This complex within the ETC also plays a role within the Citric Acid Cycle

a. Plastoquinone

b. NADH Dehydrogenase Complex

c. Cytochrome C reductase complex

d. Cytochrome b6-f Complex

e. Succinate Dehydrogenase Complex

Answer 1

1) co-transporter used for Na+ - glucose simultanously transportation across the membrane so that glucose can be absorbed into intestinal apical cell from digestive tract. Once it is transported inside now Na+ ions throw out by using Na+-K+ pump and left out of glucose now transported to blood using uniporter gluT transporter.

2) c option is correct

Acetyl coA combine with Oxaloacetate to for citrate, first product of citric acid cycle.

3) e option is correct.

Succinate dehydrogenase enzyme of citric acid cycle is mebrane associated with mitochondria which is directly involve in electron transport chain as complex II.

Hope it's clear..thanks