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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
larger and in a brighter field of view
B
larger and in a darker field of view
C
smaller and in a darker field of view
D
smaller and in a brighter field of view
2) Which formula represents an organic compound?
A
NaCl
B
C12H22O11
C
Mg(OH)2
D
NH3
3) Which is an organic compound found in most cells?
A
oxygen gas
B
sodium chloride
C
water
D
glucose
4) Which are the four most abundant elements in living cells?
A
carbon, oxygen, sulfur, phosphorus
B
carbon, sulfur, hydrogen, magnesium
C
carbon, oxygen, hydrogen, nitrogen
D
carbon, oxygen, nitrogen, sulfur
5) Which pair of compounds can be classified as inorganic?
A
nucleic acids and proteins
B
water and salts
C
nucleic acids and minerals
D
proteins and water
6) Which structure includes all of the others?
A
chromosomes
B
nucleolus
C
nucleus
D
genes
7) Most cell membranes are composed principally of
A
chitin and starch
B
proteins and lipids
C
DNA and ATP
D
nucleotides and amino acides
8) Which structure is usually present only in animal cells?
A
nucleus
B
cell wall
C
centriole
D
vacuole
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 enzymes on either side of the cell membrane
C
concentration of water molecules inside and outside the cell
D
rate of movement of insoluble molecules inside the cell
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
diffusion
C
active transport
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
phagocytosis
C
pinocytosis
D
diffusion
12) Which substances are secreted at the endings of nerve cells?
A
neurotransmitters
B
lipids
C
antibodies
D
antigens
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 DNA is present in each type of cell
B
liver cells can reproduce while the nerve cells cannot
C
liver cells contain fewer chromosomes than nerve cells
D
different genes function in each type of cell
14) Much of the carbon dioxide produced by green plants is not excreted as a metabolic waste because it
A
is too large to pass through cell membranes
B
is needed for cellular respiration
C
can be used for photosynthesis
D
can be used for the synthesis of proteins
15) Which part of a molecule provides energy for life processes?
A
chemical bonds
B
carbon atoms
C
oxygen atoms
D
inorganic nitrogen
*select an answer for all questions
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