Bio Review 1st quarter

What type of molecule contains amino acids?

• simple carbohydrate

• fat

• complex carbohydrate

• protein

What type of molecule is an enzyme?

• simple carbohydrate

• fat

• complex carbohydrate

• protein

The diagram shows the structure of something called a triglyceride. A triglyceride is a

• fat

• protein

• carbohydrate

• sugar

Starch, cellulose an glycogen belong to the class of

• proteins

• lipids

• sugars

• Polysachharides

Which of the following biological molecules contains the elements carbon, hydrogen and oxygen?

I. carbohydrates

II. proteins

III. fats

• I and II only

• I and III only

• II and III only

• I, II and III

Which of the following molecules is a quick source of energy?

• carbohydrate

• fat

• protein

• water

Salivary amylase is an enzyme in humans that breaks down starches. What substance would humans have difficulty digesting with this enzyme?

• lipids

• nucleic acids

• proteins

• carbohydrates

Which best explains why the rate of a biochemical reaction decreases at high temperatures?

• The activation energy increases.

• The shape of the enzyme changes.

• The enzyme-substrate complex forms.

• The bonds between substrates are broken.

What will most likely be the result if all of the mitochondria are removed from a plant cell?

• It will be unable to carry out respiration

• It will lose water through osmosis

• It will break down the ribosomes in the cell

• It will be unable to photosynthesize.

During strenuous exercise, body temperature increases. The body responds to the increase in temperature by sweating, which helps to reduce the body temperature. Which is demonstrated in this situation?

• excretion

• metabolism

• homeostasis

• synthesis