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STAAR Review 1 Biomolecules

Total questions: 15

Worksheet time: 45mins

Name
Class
Date
1.

How do enzymes affect the rate of a chemical reaction?

a)

Enzymes decrease the rate of a chemical reaction by increasing the activation energy needed for the reaction to occur.

b)

Enzymes have no effect on the rate of a chemical reaction.

c)

Enzymes increase the rate of a chemical reaction by lowering the activation energy needed for the reaction to occur.

d)

Enzymes only affect the rate of reactions at high temperatures.

2.

What is the significance of the cell membrane?

a)

It provides energy for the cell's activities.

b)

It regulates what enters and exits the cell, providing protection and support.

c)

It is responsible for protein synthesis.

d)

It stores genetic information.

3.

What are biomolecules?

a)

Organic molecules that are essential for life, including carbohydrates, lipids, proteins, and nucleic acids.

b)

Inorganic compounds that do not play a role in biological processes.

c)

Synthetic compounds created in laboratories for research purposes.

d)

Simple molecules that do not contribute to cellular functions.

4.

How do proteins contribute to cellular functions?

a)

Proteins are primarily used for energy storage in cells.

b)

Proteins perform a variety of functions including catalyzing reactions, providing structure, and facilitating communication within and between cells.

c)

Proteins are only involved in the immune response of the body.

d)

Proteins serve as the main source of genetic information in cells.

5.

What is the role of carbohydrates in plant structure?

a)

Carbohydrates provide energy for photosynthesis.

b)

Carbohydrates, particularly cellulose, provide structural support in plant cell walls.

c)

Carbohydrates are primarily used for water storage in plants.

d)

Carbohydrates help in the absorption of nutrients from the soil.

6.

What are carbohydrates primarily used for in living organisms?

a)

Long-term energy storage

b)

Short-term energy storage and as structural components

c)

Protein synthesis

d)

Fat storage

7.

What is the primary function of lipids?

a)

To provide immediate energy for cellular processes

b)

To store long-term energy, form cell membranes, and act as signaling molecules

c)

To facilitate the transport of oxygen in the blood

d)

To act as enzymes in biochemical reactions

8.

What is the function of nucleic acids?

a)

To store and transmit genetic information.

b)

To provide energy for cellular processes.

c)

To act as catalysts in biochemical reactions.

d)

To form the structural components of cells.

9.

What is a monosaccharide?

a)

A type of protein that consists of amino acids.

b)

The simplest form of carbohydrates, consisting of a single sugar molecule, such as glucose.

c)

A complex carbohydrate made of multiple sugar molecules.

d)

A lipid that is soluble in water.

10.

What is the difference between saturated and unsaturated fats?

a)

Saturated fats have no double bonds between carbon atoms, while unsaturated fats have one or more double bonds, making them liquid at room temperature.

b)

Saturated fats are always solid at room temperature, while unsaturated fats are always liquid.

c)

Saturated fats contain more calories than unsaturated fats, making them less healthy.

d)

Unsaturated fats are derived from animal sources, while saturated fats come from plant sources.

11.

What are the four main types of biomolecules?

a)

Carbohydrates, lipids, proteins, and nucleic acids

b)

Vitamins, minerals, proteins, and carbohydrates

c)

Carbohydrates, sugars, fats, and proteins

d)

Lipids, proteins, enzymes, and carbohydrates

12.

What is the structure of a lipid?

a)

Lipids are composed of amino acids and nucleotides.

b)

Lipids are composed of glycerol and fatty acids, forming structures like triglycerides and phospholipids.

c)

Lipids are made up of sugars and starches.

d)

Lipids consist of proteins and enzymes.

13.

What is the function of hormones in the body?

a)

Hormones are responsible for digestion and nutrient absorption.

b)

Hormones are signaling molecules that regulate physiological processes and maintain homeostasis.

c)

Hormones primarily function to provide energy to cells.

d)

Hormones are waste products that the body needs to eliminate.

14.

What are the building blocks of proteins?

a)

Nucleotides

b)

Fatty acids

c)

Amino acids

d)

Monosaccharides

15.

What role do enzymes play in biochemical reactions?

a)

Enzymes are proteins that provide structural support to cells.

b)

Enzymes act as catalysts that lower the activation energy required for reactions, speeding up the process.

c)

Enzymes are responsible for transporting molecules across cell membranes.

d)

Enzymes are hormones that regulate metabolic processes.