Biochemistry

What are the subunits of a carbohydrate?

• proteins

• lipids

• simple sugars

• amino acids

Proteins, starches, and DNA are similar in that they are all

• organic compounds

• parts of genes

• made of amino acids

• made of simple sugars

Water is classified as an inorganic compound because it

• does not contain nitrogen

• does not contain carbon

• contains hydrogen

• contains oxygen

The shape of an enzyme determines the

• specific type of molecule it interacts with during a reaction

• rate at which the enzyme breaks down during a reaction it regulates

• pH of all body systems

• temperature of the products of the reaction it regulates

Which class of molecules is responsible for speeding up chemical reactions?

• sugars

• fats

• genetic material

• enzymes

Plants such as the Venus flytrap produce chemical compounds that break down insects into substances that are usable by the plant. The chemical compounds that break down the insects are most likely

• fats

• minerals

• complex carbohydrates

• biological catalysts

Which statement about enzymes is not correct?

• Enzymes are composed of polypeptide chains.

• Enzymes form a temporary association with a reactant.

• Enzymes are destroyed when they are used and must be synthesized for each reaction.

• Enzymes are specific because of their shape and catalyze only certain reactions.

Glucose molecules are the building blocks of what class of macromolecule?

• proteins

• lipids

• nucleotides

• carbohydrates

If a specific carbohydrate molecule contains ten hydrogen atoms, that same molecule would most probably contain

• one nitrogen atom

• ten nitrogen atoms

• five oxygen atoms

• twenty oxygen atoms

Plants store carbohydrates in the form of

• amino acids

• fatty acids

• starch

• nucleic acids

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NGSS.MS-LS1-6