Which of the following best describes the structure of a nucleotide?

Amino group, carboxyl group, R group

Which of the following best describes the relationship between enzyme structure and function?

The shape of an enzyme determines its function

Enzymes work regardless of their shape

Enzymes are only made of lipids

Enzymes store genetic information

Which of the following best explains why enzymes are specific to certain substrates?

The active site of the enzyme fits only certain substrates

Enzymes are made of carbohydrates

Enzymes are not affected by temperature

Enzymes can bind to any molecule

How does a change in pH affect enzyme activity?

It can denature the enzyme, reducing activity

It turns enzymes into carbohydrates

How does the structure of a carbohydrate relate to its function as an energy source?

The bonds between monosaccharides can be easily broken to release energy

Carbohydrates are made of amino acids

Carbohydrates are not used for energy

Carbohydrates are only found in DNA

Why do people who are lactose intolerant have trouble digesting milk products?

They lack the enzyme lactase needed to break down lactose

They have extra lipids in their cells

Explain how the structure of nucleic acids allows them to store genetic information.

The sequence of nucleotides encodes genetic instructions

Nucleic acids are made of amino acids

Nucleic acids are used for energy storage

Nucleic acids are always single-stranded

How does the structure of an enzyme relate to its ability to lower activation energy in a reaction?

The enzyme's active site binds to substrates, stabilizing the transition state and lowering activation energy

Enzymes increase the temperature of the reaction

Enzymes are not involved in chemical reactions

A student observes that an enzyme works best at pH 7 but loses activity at pH 3 or pH 10. What is the most likely explanation?

Extreme pH changes alter the enzyme's shape, reducing its activity

The enzyme is made of carbohydrates

The enzyme is not affected by pH

The enzyme becomes a lipid at high pH

A person with diabetes eats a meal high in carbohydrates. Predict what will happen to their blood glucose levels and explain why.

Blood glucose will remain high because insulin is not produced or used effectively

Blood glucose will decrease because insulin is overproduced

Blood glucose will not change because carbohydrates are not digested

Blood glucose will decrease because of increased enzyme activity

A scientist adds a lipid-digesting enzyme to a test tube containing only carbohydrates. Predict the outcome and justify your answer.

No digestion will occur because the enzyme is specific to lipids

The carbohydrates will be digested

The enzyme will turn into a carbohydrate

The carbohydrates will become lipids

A mutation changes the sequence of nucleotides in a gene. Predict how this could affect the structure and function of the resulting protein.

The protein's structure may change, possibly altering its function

The protein will always function better

The protein will become a lipid

The protein will not be affected

A person is unable to digest fats efficiently. Propose a possible reason based on macromolecule-enzyme interactions.

They lack the enzyme needed to break down fats (lipase)

They have extra carbohydrates in their diet

FCHS Biology: U1, Topics 4-5 Quiz

Authored by Sarah Kufrovich

Science

10th Grade

NGSS covered

Used 1+ times

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25 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of macromolecule is primarily responsible for storing genetic information in cells?

Carbohydrates

Nucleic acids

Lipids

Proteins

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the monomer unit of proteins?

Fatty acids

Amino acids

Nucleotides

Monosaccharides

Which macromolecule is the main component of cell membranes?

Proteins

Lipids

Carbohydrates

Nucleic acids

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary function of enzymes in biological systems?

Store genetic information

Speed up chemical reactions

Provide structural support

Store energy

Which macromolecule is broken down by the enzyme lactase?

Protein

Lipid

Carbohydrate

Nucleic acid

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a simple sugar that is a building block of carbohydrates?

Glycerol

Glucose

Adenine

Alanine

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to most enzymes if the temperature becomes too high?

They work faster

They denature

They become more stable

They replicate

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FCHS Biology: U1, Topics 4-5 Quiz

Which type of macromolecule is primarily responsible for storing genetic information in cells?

What is the monomer unit of proteins?

Which macromolecule is the main component of cell membranes?

What is the primary function of enzymes in biological systems?

Which macromolecule is broken down by the enzyme lactase?

Which of the following is a simple sugar that is a building block of carbohydrates?

What happens to most enzymes if the temperature becomes too high?

Which macromolecule is most directly involved in the process of diabetes?

Which of the following best describes the structure of a nucleotide?

Which macromolecule is most likely to be affected if a person is lactose intolerant?

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