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Characteristics of Life — Cumulative exam Answers

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A doctor suspects that one of her patients has a deficiency in one of the six key elements found in living organisms. He has low energy and extremely weak, soft bones. Based on this information alone, which nutrient supplement will she most likely prescribe?

A
phosphorus
B
zinc
C
sodium
D
sulfur
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Which organelles are not found in plant cells?

A
vacuoles
B
mitochondria
C
chloroplasts
D
centrioles
23

Which microscope uses a probe to map atoms on the surface of a specimen?

A
transmission electron microscope
B
compound light microscope
C
scanning electron microscope
D
scanning tunneling microscope
24

A scientist is working with methane (CH4) and butane (C4H10). Which statement best compares these chemicals?

A
They are two different types of molecules that each contain the same number of atoms.
B
They are two different types of atoms that are each made up of a different number of elements.
C
They are compounds made of the same two elements, but each contain different numbers of atoms.
D
They are matter made of the same two compounds, but each contain different types of elements.
25

Tissue cultures (samples of cancer cells) are taken from cancer patients, and the cells are then grown in a laboratory. What is the purpose of growing cancer cells in a laboratory?

A
to test medicinal treatments before giving them to patients
B
to replace cancer cells with healthy cells
C
to provide evidence of cancer cells in the patient
D
to stop the cancer from growing in the patient

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