Photosynthesis into specialized cells in the veins of leaves

Reference no: EM13526770

1. In most cells, there are electrochemical gradients of many ions across the plasma membrane even though there are usually only one or two electrogenic pumps present in the membrane. The gradients of the other ions are most likely accounted for by

A) ion channels.
B) cotransport proteins.
C) carrier proteins.
D) B and C only
E) A, B, and C

2. What mechanisms do plants use to load sucrose produced by photosynthesis into specialized cells in the veins of leaves?

A) an electrogenic pump
B) a contransport protein
C) a proton pump
D) A and C only
E) A, B, and C

3. The sodium-potassium pump in animal cells requires cytoplasmic ATP to pump ions across the plasma membrane. When the proteins of the pump are first synthesized in the rough ER, what side of the ER membrane will the ATP binding site be on?

A) It will be on the side facing the interior of the ER.
B) It could be facing in either direction because the orientation of proteins is scrambled in the
Golgi apparatus.
C) It will be on the cytoplasmic side of the ER.
D) It doesn't matter, because the pump is not active in the ER.

Reference no: EM13526770

Questions Cloud

Exceptions maintain body temperature : In Burgman's rule, what exceptions to this general rule can you think of? What adaptations help these exceptions maintain body temperature?

What is the role of the ninth triplet : For each mutant protein, determine the specific ribonucleotide change that led to its synthesis. The wild-type RNA consists of nine triplets. What is the role of the ninth triplet? For the first eight wild-type triplets, which, if any, can you deter..

In a biochemical pathway-endergonic reactions : In a biochemical pathway, three ATP molecules are hydrolyzed. The endergonic reactions in the pathway require a total of 17.3 kcal/mole of energy to drive the reactions of the pathway. What is the overall change in free energy of the biochemical path..

In the f2 generation : In the f2 generation, how many genotypic classes could be generated from a dihybrid cross of two heterozygotes in which the genes involved show complete dominance?

Photosynthesis into specialized cells in the veins of leaves : In most cells, there are electrochemical gradients of many ions across the plasma membrane even though there are usually only one or two electrogenic pumps present in the membrane. What mechanisms do plants use to load sucrose produced by photosynt..

The evolution of cell membranes : Which of the following is true of the evolution of cell membranes? Which of the following would likely move through the lipid bilayer of a plasma membrane most rapidly?

In the diversity and abundance of bacteria : In the diversity and abundance of bacteria, we always have some uncertainty about the identity of an isolate. With this in mind, how can we be certain that growth with a metallic sheen is truly a coliform bacterium?

Design diagnostic test to distinguish mutant allele : I want to design a diagnostic test to distinguish a mutant allele from a wild type allele, as in the two allele depicted below. I have the choice of using two restriction enzymes (A and B) with target sites marked by the placement of A and B on th..

Lysing the red blood cells releases the hemoglobin : You suspect that Michael has sickle cell anemia and you have ordered an isoelectric focusing analysis of the child’s lysed red blood cells. (Lysing the red blood cells releases the hemoglobin.) Draw a diagram of the predicted results. Why will this t..

User Account

All Pages