Which of the following statements are true regarding passive transport? Choose 2 answers:

А. Charged ions cannot pass through a cell membrane via passive transport.

B. Carbon dioxide can pass through a cell membrane via passive transport.

C. Oxygen cannot enter a cell through passive transport.
Take
level

D. Simple diffusion, a type of passive transport, requires the use of membrane proteins.

What re the two main phrases of the cell cycle.

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

How many species of living things are alive on earth today? more than 1,000,000 none of these answers are correct 100-500 1,000 –500,000 o 500,000 -1,000,000