BIOL 1001 Exam Week 2 / BIOL1001 Week 2 Exam(NEW):Introduction to Biology: Walden University

BIOL 1001 Exam Week 2 / BIOL1001 Week 2 Exam (Latest): Introduction to Biology: Walden University

BIOL 1001 Review Test Submission: Exam Week 2 (Latest): Introduction to Biology: Walden University

Nutrients that the human body requires in large quantities are called:

a. Micronutrients

b. Macronutrients

c. Vitamins

d. Trace nutrients

e. Minerals

QUESTION 2

1 points

SAVED

Vitamins in the human body

a. Are sources of stored energy

b.Help enzymes function properly

c.Act as hormones that trigger cells to take up glucose

d.Are the basis of the plasma membrane

QUESTION 3

1 points

SAVED

Carbohydrates are an excellent source of energy for the body. If a candy bar and a pear contain an equal number of calories from carbohydrates, which is a healthier food and why?

a. The candy bar is healthier because it contains simple sugars, which are easier for the body to get energy from.

b.The pear is healthier because it contains fewer chemical bonds that need to be broken in the digestive tract.

c.The pear is healthier because it contains more vitamins, minerals, and fiber.

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Question Completion Status:

QUESTION 4

1 points

SAVED

What would happen if activation energy barriers didn’t exist?

a.

e. Neither is better because they both contain the same number of calories.

Substrates would not bind properly to enzymes

b.Chemical reactions in the body would never occur.

c.Coenzymes would not work, but enzyme function would not be a"ected.

d.The body’s metabolism would decrease to the point where food molecules couldn’t be broken down.

e.All chemical reactions in the body would proceed whether they were needed or not.

QUESTION 5

1 points

SAVED

Cell membranes are:

a. Always impermeable to small molecules

b. Always permeable to charged atoms and molecules

c. Di"erentially permeable

d. Impermeable to all atoms and molecules

QUESTION 6

1 points

SAVED

Channels in phospholipid bilayers that allow molecules to pass into and out of the cell are made of::

a. Carbohydrates

b. Proteins

c. Nucleic acids

d. Lipids

QUESTION 7

1 points

SAVED

Many scientists believe that the global warming observed over the past 100 years has been caused by elevated levels of gases in the atmosphere. Which of the following gases is primarily responsible for this problem?

a. Carbon monoxide

b. Carbon dioxide

c. Nitrous oxide

d. Oxygen

e. Ozone

QUESTION 8

1 points

SAVED

The greenhouse e"ect is most similar to:

a. Heating up the air inside a car by parking it in the sun

b. Warming the air for a hot-air balloon with a propane burner

c. Burning kerosene in a heater to warm up the air inside a cold house

d. Growing plants in your office to reduce indoor air pollution

e. Cooking food with a charcoal grill

Question Completion Status:

QUESTION 9                                                                                                           1 points       SAVED

Where does most of the carbon dioxide released by human activities come from?

a. Exhaling (cellular respiration waste products)

b. Decomposing garbage in landfills

c. Burning wood for cooking fires

d. Burning fossil fuels

QUESTION 10

1 points

SAVED

What happens to the carbon dioxide produced from cellular respiration?

a. It is released into space from the atmosphere.

b. It is converted into glucose by plants.

c. It is converted into carbon monoxide by the oceans.

d. It reacts with nitrogen to form fossil fuels.