AnswersGA-GSE Biology AElements of Living Organisms

Elements of Living Organisms — Unit test Answers

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A scientist is examining the role of an element found in fats and carbohydrates of living things. This element makes up 65% of human body mass. Which statement describes the element he is studying?

A
He is studying oxygen, which can also be found in proteins.
B
He is studying oxygen, which is the most abundant element in the atmosphere.
C
He is studying nitrogen, which can also be found in proteins.
D
He is studying nitrogen, which is the most abundant element in the atmosphere.
22
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Which carbohydrate can be used by the body as an immediate source of energy?

A
glucose
B
cellulose
C
chitin
D
glycogen
23

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P
Photosynthesis removes carbon from the atmosphere, and cellular respiration releases carbon back into the atmosphere.
P
Photosynthesis is part of the carbon cycle, and cellular respiration is not.
O
Only plants perform photosynthesis, and only animals perform cellular respiration.
P
Photosynthesis releases carbon into the atmosphere, and cellular respiration removes carbon from the atmosphere.
24

Which is released during the formation of a peptide bond?

A
a five-carbon sugar
B
an amino group
C
an amino acid
D
a water molecule
25

Which describes the basic structure of a fatty acid?

A
a long carbon and hydrogen chain and a phosphate group
B
a long carbon and hydrogen chain and a glycerol
C
a long carbon and hydrogen chain and a carboxyl group
D
a long carbon and hydrogen chain and an alcohol

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