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Living Environment Mid-Term Review
Test Description: Topic 1
Instructions: Answer all questions to get your test result.
1) A student observed a Paramecium under the low power objective of a microscope (100x) and then under high power (400x). The image of the Paramecium under low power, compared to the image of the same Paramecium under high power, would be
A
smaller and in a brighter field of view
B
larger and in a darker field of view
C
larger and in a brighter field of view
D
smaller and in a darker field of view
2) Which formula represents an organic compound?
A
NH3
B
Mg(OH)2
C
NaCl
D
C12H22O11
3) Which is an organic compound found in most cells?
A
oxygen gas
B
water
C
sodium chloride
D
glucose
4) Which are the four most abundant elements in living cells?
A
carbon, oxygen, nitrogen, sulfur
B
carbon, oxygen, sulfur, phosphorus
C
carbon, oxygen, hydrogen, nitrogen
D
carbon, sulfur, hydrogen, magnesium
5) Which pair of compounds can be classified as inorganic?
A
water and salts
B
nucleic acids and minerals
C
nucleic acids and proteins
D
proteins and water
6) Which structure includes all of the others?
A
nucleus
B
nucleolus
C
genes
D
chromosomes
7) Most cell membranes are composed principally of
A
DNA and ATP
B
chitin and starch
C
nucleotides and amino acides
D
proteins and lipids
8) Which structure is usually present only in animal cells?
A
vacuole
B
nucleus
C
centriole
D
cell wall
9) Normally, in the process of osmosis, the net flow of water molecules into or out of the cell depends upon differences in the
A
rate of molecular motion on either side of the cell membrane
B
concentration of water molecules inside and outside the cell
C
rate of movement of insoluble molecules inside the cell
D
concentration of enzymes on either side of the cell membrane
10) Sodium ions are pumped from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of
A
passive transport
B
active transport
C
diffusion
D
osmosis
11) The diagram below shows the same type of molecule in area A and area B. With the passage of time, some molecules move from area A to area B. This movement is the result of the process of
A
cyclosis
B
pinocytosis
C
diffusion
D
phagocytosis
12) Which substances are secreted at the endings of nerve cells?
A
antibodies
B
neurotransmitters
C
antigens
D
lipids
13) A human liver cell is very different in structure and function from a nerve cell in the same person. This is best explained by the fact that
A
different genes function in each type of cell
B
different DNA is present in each type of cell
C
liver cells can reproduce while the nerve cells cannot
D
liver cells contain fewer chromosomes than nerve cells
14) Much of the carbon dioxide produced by green plants is not excreted as a metabolic waste because it
A
can be used for the synthesis of proteins
B
is too large to pass through cell membranes
C
is needed for cellular respiration
D
can be used for photosynthesis
15) Which part of a molecule provides energy for life processes?
A
carbon atoms
B
inorganic nitrogen
C
oxygen atoms
D
chemical bonds
*select an answer for all questions
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