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Biomolecules

Test Description: 1 st block review Macromolecules and enzymes

Instructions: Answer all questions to get your test result.

1) The building blocks of proteins are

Alipids Benzymes Cnucleotides Damino acids

2) Why are there so many different proteins?

AAmino acids with different R groups make up different proteins. BProteins make up amino acids. CMany different proteins link to form different amino acids. DAll proteins are made up of the same amino acids

3) What is the relationship between fatty acids and lipids?

AFatty acids are made up of lipids BLipids are made up of fatty acids CCarbohydrates contain lipids, and nucleic acids have fatty acids DThere is no relationship between them.

4) When your body's pH becomes too acidic, what does your body release to maintain homeostasis?

Acarbohydrates Bacids Cbuffers Dbases

5) What is the difference between monosaccharides and polysaccharides?

Athere is no difference between them Bmonosaccharides are more than one polysaccharide but together Cpolysaccharides are more than one monosaccharide put together Dpolysaccharides are amino acids and monosaccharides are sugars

6) Lipase is a biocatalyst that breaks down fats. Lipase is which type of biomolecule?

Acarbohydrate Blipid Cprotein Dnucleic acid

7) The enzyme carbohydrase can break down sugar, but it cannot break down proteins. Why is that?

AThere is no reason. The reaction should have worked. BProteins cannot be broken down by other proteins. CCarbohydrase only binds to proteins at the active site. DCarbohydrase lowers the activation energy needed to break down sugars, but not proteins.

8) Who is responsible for catalyzing metabolic reactions in our bodies?

Alipids Bcarbohydrates Cnucleic acids Denzymes

9) A mouse was poisoned. The poison attached itself to the active site of an important enzyme. What would happen to the mouse's enzyme?

AThe enzyme will not be able to work with a blocked active site. BThe enzyme would work as normal. CThe enzyme would work at a slow pace. DThe enzyme would repair itself overtime and return to its normal fucntion.

10) How do enzymes work?

Aby slowing down chemical reactions Bby binding to any substrate Cby denaturing DBy binding on to a specific substrate and lowering activation energy

11) Animals store excess sugar as

Aoil Bglycogen Ccellulose Dcellulite

12) Plants store excess sugar as

Alipids Bcellulite Ccellulose Dglycogen

*select an answer for all questions

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