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Biomolecules Practice Questions

The document discusses biomolecules and enzymes. It provides examples of different types of biomolecules like proteins, carbohydrates, lipids, and nucleic acids and asks questions about their structures and functions. It also discusses enzymes and their role in breaking down substrates and affecting reaction rates. Maintaining a constant blood pH is important because enzymes work best within a narrow pH range.

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Noura Rose
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434 views4 pages

Biomolecules Practice Questions

The document discusses biomolecules and enzymes. It provides examples of different types of biomolecules like proteins, carbohydrates, lipids, and nucleic acids and asks questions about their structures and functions. It also discusses enzymes and their role in breaking down substrates and affecting reaction rates. Maintaining a constant blood pH is important because enzymes work best within a narrow pH range.

Uploaded by

Noura Rose
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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TEKS 9A – compare the structures and functions of

different types of biomolecules, including carbohydrates,


lipids, proteins, and nucleic acids (Reporting Category 1)
1. Like complex carbohydrates, proteins are biomolecules that serve many
functions and can be chemically broken down and restructured. Both proteins and
complex carbohydrates are which of the following?

A Polymers of smaller subunits

B Sequences of sugars

C Lipids of large molecules

D Nucleotides of DNA

2. Each of these represents a different biomolecule. Which of the following is a


carbohydrate?

A B      
 

C       D  

3. Which biomolecule is properly matched to its monomer?

A nucleic acid : amino acid

B polypeptide : 1 glycerol + 3 fatty acids

C lipid : nucleotide

D carbohydrate : monosaccharide
4. Nucleic acids are biomolecules. Which of the following is the function of nucleic
acids?

A Serve as the primary structural unit of biological membranes

B Serve as energy storage

C Store and transmit genetic information

D Serve as biological catalysts

5. One function of lipids is to store energy. What is another function of lipids in the
human body?

A To form plasma membranes

B To make energy from the sun

C To control chemical reactions

D To provide quick energy for the cell

6. The molecule in the diagram plays what role in the body?

A Releasing energy

B Forming part of the sugar-phosphate


backbone of DNA

C Storing fat

D Controlling blood glucose levels


TEKS 9C – identify and investigate the role of enzymes
(Reporting Category 4)
Use the following reading passage for question 7.

Organisms living in a bog environment must be able to tolerate nitrogen-poor acidic


conditions. Bog plants such as the Venus flytrap and sundew are able to obtain
their nitrogen by attacking and consuming insects. These plants produce chemicals
that break down the insects into usable compounds.

7. These chemicals present in the bog plants that break down the insects
mentioned in the reading passage are most likely—

A hormones.
B lipids.
C enzymes.
D carbohydrates.

8. Line B in the given graph represents the reaction with an enzyme added to
substrates.

How did the enzyme affect the reaction?

A Increased the activation energy

B Increase the energy change

C Lowered the energy change

D Lowered the activation energy


9. Which statement is a valid conclusion based on the information in the graph
below?

A Temperature can influence the rate of action of an enzyme.

B The maximum rate of human respiration occurs at about 57°C.

C Growth can be controlled by enzyme action.

D The maximum rate of human digestion occurs at about 45°C.

10. Why is maintenance of a constant blood pH critical for body processes?

A Blood with a high pH helps prevent cancer.

B Enzymes work best within a narrow pH range.

C The production of vitamin C by skin cells requires low pH values.

D Some bacteria thrive in very acidic conditions.

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