PCB 4723C Study Guide - Midterm Guide: Facilitated Diffusion, Countercurrent Exchange, Carbonic Anhydrase

Question 1

Plasma membranes are selectively permeable. This means that

Question 2

Oxygen molecules O₂ crosse a plasma membrane by

Question 3

Facilitated diffusion across a biological membrane requires ________ and moves a substance ________ its concentration gradient.

Question 4

When two aqueous solutions that differ in solute concentration are placed on either side of a semipermeable membrane and osmosis is allowed to take place, the water will

Question 5

Kinetic energy differs from chemical energy in that

Question 6

When a cell uses chemical energy to perform work, it uses the energy released from a(n) ________ reaction to drive a(n) ________ reaction.

Question 7

When an enzyme catalyzes a reaction

Question 8

Which of the following statements regarding enzyme function is false?

I have this questions for my homework i need help with them look please it is important i need help so please give me the correct answers for each question and also please be clear to understand and aslo be correct it is very important becuase i need them so i really need the right answers. please help me and on Questions 6 and 9 please help me with it hope you can help me with the correct answers please

Question 5

At a constant temperature, if you increase the number of unsaturated fatty acid chains in the phospholipid, the membrane will become......

Question 6

Bacteria in a hot spring at 80 degrees celsius would be expected to have ______________ in their cell membrane

Question 7

Membrane proteins have an important role in membrane fluidity

Question 8

The HIV virus can't attach to cells that have a mutation in the CCR5 gene and so such individuals are resistant to HIV. What population of people have a higher incidence of the mutant CCR5 gene and why?

Question 9

Nematode trapping fungi have ______________ molecules called ______________ that recognize specific carbohydrates on the surface of the nematode worms. This is how a fungus can recognize that its prey, the nematode worm, has wriggled into the loop. Write two words on lowercase separated by a space with no other syntax

Question 10

Diffusion requires energy

Question 11

The net direction of molecule movement when molecules diffuse is

Question 12

In osmosis, water molecules from a solution of higher solute concentration cross a semi-permeable membrane into a solution of lower solute concentration?

Question 13

Which best defines osmosis?

Question 14

Animal cells placed into a hypotonic solution would most likely?

Question 15

Glucose and amino acids move into cells via carrier proteins, the same protein can move glucose or amino acids

Question 16

ATP powered pumps move substances into and out of cells by diffusion?

Question 17

For every 3 Na ions moved out, 2 K ions are moved into a cell by one cycle of the sodium-potassium pump.

Question 18

Bulk transport of fluid and any of the substances within that fluid is called

I have this questions for my homework i need help with them look please it is important i need help so please give me the correct answers for each question and also please be clear to understand and aslo be correct it is very important becuase i need them so i really need the right answers. please help me and be correct and clear it is important ok

Question 5

At a constant temperature, if you increase the number of unsaturated fatty acid chains in the phospholipid, the membrane will become......

Question 6

Bacteria in a hot spring at 80 degrees celsius would be expected to have ______________ in their cell membrane

Question 7

Membrane proteins have an important role in membrane fluidity

Question 8

The HIV virus can't attach to cells that have a mutation in the CCR5 gene and so such individuals are resistant to HIV. What population of people have a higher incidence of the mutant CCR5 gene and why?

Question 9

Nematode trapping fungi have ______________ molecules called ______________ that recognize specific carbohydrates on the surface of the nematode worms. This is how a fungus can recognize that its prey, the nematode worm, has wriggled into the loop. Write two words on lowercase separated by a space with no other syntax

Question 10

Diffusion requires energy

Question 11

The net direction of molecule movement when molecules diffuse is

Question 12

In osmosis, water molecules from a solution of higher solute concentration cross a semi-permeable membrane into a solution of lower solute concentration?

Question 13

Which best defines osmosis?

Question 14

Animal cells placed into a hypotonic solution would most likely?

Question 15

Glucose and amino acids move into cells via carrier proteins, the same protein can move glucose or amino acids

Question 16

ATP powered pumps move substances into and out of cells by diffusion?

Question 17

For every 3 Na ions moved out, 2 K ions are moved into a cell by one cycle of the sodium-potassium pump.

Question 18

Bulk transport of fluid and any of the substances within that fluid is called