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Cell Transport Exam Review
Test Description: Transport and Energy Flow
Instructions: Answer all questions to get your test result.
1) Which of the following will happen to a cell If the concentration of a sugar solution is lower outside the cell than inside the cell?
A
sugar will move into the cell
B
water will move out of the cell
C
water will move into the cell
D
sugar will move out of the cell
2) Which statement about diffusion is true?
A
Diffusion happens when molecules move from a high concentration to a low concentration
B
Diffusion happens when molecules move from a low concentration to a high concentration
C
energy is required for molecules to move across a membrane
D
During diffusion, molecules move only in one direction.
3) A red blood cell is placed in an isotonic solution. What will most likely happen to the blood cell?
A
Water will enter the cell, causing it to swell
B
Water will stop moving in and out of the cell.
C
Water will exit the cell, making it shrink
D
Water will exit and enter the cell at a constant rate.
4) Cells sometimes use passive transport to move molecules across their membranes. The rate at which a cell engages in passive transport is determined by
A
the size of the cell's chloroplasts.
B
the composition of the cell membrane.
C
the number of vacuoles that the cell contains.
D
the amount of energy that the cell generates
5) Diffusion does not require the cell to expend ATP. Therefore, diffusion is considered a type of
A
active transport
B
exocytosis
C
endocytosis.
D
passive transport
6) Although a fetus is relatively protected in its mother's womb, a number of different toxins can harm the fetus. These include lead, mercury, glycol ethers, and many other substances. How do toxins usually reach the developing fetus?
A
by recombination of genes from the fetus and mother
B
by active transport from the ovary
C
by transfer of blood from the mother to the fetus
D
by diffusion across placental membranes
7) Why could drinking saltwater instead of freshwater be dangerous to humans?
A
Saltwater is hypertonic relative to human tissue.
B
Saltwater is hypotonic relative to human tissue.
C
Saltwater is too acidic.
D
Saltwater is isotonic relative to human tissue
8) Which of the following is essential for diffusion to occur?
A
a permeable membrane
B
a source of energy
C
a concentration gradient
D
a protein substance
9) The bonding of oxygen to red blood cells is important to the body because it enables the body to
A
make energy from light.
B
maintain a constant temperature
C
absorb nutrients from food
D
perform aerobic respiration in cells.
10) Which of the following actions is responsible for the production of energy-rich ATP molecules?
A
the recycling of light energy
B
cellular respiration
C
the division of starch molecules
D
protein synthesis
11) What are the reactants in the equation for cellular respiration?
A
glucose and oxygen
B
oxygen and lactic acid
C
carbon dioxide and water
D
water and glucose
12) The energy required to lift an object is supplied by ATP derived from the breakdown of molecules of
A
glycolosis
B
glucose
C
glutamate
D
glycerol
13) To which class of nutrients do molecules of fats and oils belong?
A
proteins
B
lipids
C
nucleic acids
D
carboydrates
14) Carbohydrates are usually composed of sequences of carbon (C), hydrogen (H), and oxygen (O). Proteins differ from carbohydrates in that most proteins contain
A
helium (He)
B
iron (Fe)
C
potassium (K)
D
nitrogen (N)
15) Which biomolecule does NOT have a carbon-nitrogen bond?
A
carbohydrate
B
peptide
C
nucleic acid
D
protein
16) Which class of molecules are used by the body to synthesize proteins?
A
amino acids
B
lipids
C
carbohydrates
D
minerals
17) Which of these substances is matched with its correct organic group?
A
monosaccharides- lipids
B
enzymes- proteins
C
nucleotides- proteins
D
glycerol- carbohydrates
18) What is known as the net movement of any type of molecule from a region of higher concentration to a region of lower concentration?
A
diffusion
B
exocytosis
C
endocytosis
D
osmosis
19) Which type of cell uses the greatest amount of the ATP it produces to maintain the proper sodium and potassium levels in its cytoplasm?
A
sperm cell
B
nerve cell
C
blood cell
D
muscle cell
20) Which inorganic compound is the most important for living things?
A
water
B
salt
C
milk
D
meat
*select an answer for all questions
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