11- unit1-3

Which one of the following cell structures can be seen with a light microscope?

• mitochondrion

• ribosome

• rough ER

• smooth ER

which one of the following structures is found in animal cells, but not in plant cells?

• cell surface membrane

• centriole

• chloroplast

• golgi body

The use of electrons as a source of radiation in the electron microscope allows high resolutionn to be achieved because electrons:

• are negatively charged

• can be focused using electromagnets

• have a very short wavelength

• travel at the speed of light

Which term describes both collagen and haemoglobin?

• enzymes

• fibrous proteins

• globular proteins

• macromolecules

What type of chemical reaction is involved in the formation of disulfide bonds?

• condensation

• hydrolysis

• oxidation

• reduction

Which diagram best represents the arrangement of water molecules around sodium Na and chlorid Cl ions in solution?

• A

• B

• C

• D

What type of chemical reaction would be involved in the formation of glucose from starch or glycogen?

• hydrogen bonds

• disulfide bonds

• glycosidic bonds

• ester bonds

the reagent used for testing for reducing sugars

What is the turnover rate of enzyme?

• substrate per maximum velocity of reaction

• substrate per 1/2 velocity of reaction

• substrate per second

Michaelis-Menten constant is the value of enzyme affinity.

• substrate per maximum velocity of reaction

• substrate per 1/2 velocity of reaction

• substrate per second