Reference no: EM133210393

1. What can pass through a cell membrane without the use of channels or pumps?

Small lipid-soluble charged ions

Large lipid-insoluble molecules

Small lipid-soluble uncharged molecules

Small lipid-insoluble molecules

2. A temporary dipole can exist because:

Electrons are shared equally between both atoms

All molecules are temporary and can react to form alternative molecules

Electrons are always stolen by one of the two atoms

Electrons move freely and may be more dense on one pole compared to the other

3. What is not one of the three parts that make up a nucleotide:

Phosphate group

Pentose sugar

Amino group

Base group

4. A monosaccharide is to a polysaccharide as a nucleotide is to a:

Deoxyribonucleic Acid

Polynucleotide

Adenosine Triphosphate

Nucleic Acid

5. What chemical test is used to test for the presence of polysaccharides (starch)?

Brown paper

Biuret solution

Iodine

Benedict's solution

6. The difference between a competitive and a non-competitive inhibitor is:

Competitive inhibitors will compete with the substrate for the active spot while non-competitive inhibitors will bind to another site on the enzyme

Competitive inhibitors will knock a substrate out of its active site while a non-competitive inhibitor will only bind to the substrate's active site if it is empty

Competitive inhibitors will manage enzyme which deal with fight-flight mechanisms while non-competitive inhibitors will manage mechanisms of homeostasis

Competitive inhibitors will change the shape of an enzyme while non-competitive inhibitors will change the shape of the active spot

7. What is present in both animal and plant cells but provides additional 'structure' in plant cells?

Mitochondria

Vacuole

Nucleus

Cell Membrane

8. A redox reaction:

Involves the loss of electrons in an oxidizing agent

Involves the oxidation of the oxidizing agent

Involves the gain of the number of electrons in a reducing agent

Requires a reducing agent and an oxidizing agent

9. If phospholipids are dropped into a glass of water, we would expect:

The heads will orient themselves towards water and the tails will form hydrogen bonds with floating H+s

The heads will dissociate from the tails and the tails will orient themselves towards the water

The tails will orient themselves away from the water and the heads will be oriented toward the water

The phospholipids will dissolve into the water and not orient themselves in any discernable manner

10. Cells in a hypotonic solution tend to:

Swell as water flows into them

Shrink as water flows out of them

Not have an effect on cell walls as they are very rigid

Neither swell nor shrink since the movement of small solutes in or out of the cell do not affect size.