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Free Exam: life sciences test b

Number of Questions in Test: 21
Number of Questions in Preview: 5
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Question 1

Which of these important chemicals forms the framework for carbohydrates, fats, and other molecules of life?

Type: Multiple choice
Points: 1
Randomize answers: No

Question 2

_Study the statement above. Which of these processes returns nitrogen to the soil in a form plants can use?

Type: Multiple choice
Points: 1
Randomize answers: No

Question 3

_Study the statement above. Nitrogen is NOT a part of which of these biomolecules?

Type: Multiple choice
Points: 1
Randomize answers: No

Question 4

Nitrogen is found in a variety of forms in living things and in the environment. Molecules include N2, a diatomic molecule, and NH3, ammonia. Other forms include NO3-, or nitrate, and -NH2, an amino group.

_Refer to the information above. Which of these forms is a key component of an amino acid?

Type: Multiple choice
Points: 1
Randomize answers: No

Question 5

Fossil fuels are formed from the buried remains of decayed plants and animals that lived hundreds of millions of years ago.

_Refer to the information above. Which of the following statements about fossil fuels is false?

Type: Multiple choice
Points: 1
Randomize answers: No

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