Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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A new strain of virus (similar to the tobacco mosaic virus that has affected
tomatoes for years) has infected a commercially important strain of tomato causing them to die before
they can be harvested. A species of strawberry has a gene that makes the strawberry
resistant to this new viral strain. Scientists decide to take this gene from the strawberry and
combine it with the tomato genome to make a new hybrid tomato that is resistant to the
virus.
This new combination of genes can be classified as
a. | a clone | c. | gel electrophoresis | b. | a mutation | d. | recombinant DNA |
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2.
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A prokaryote cell, such as a bacterium, unergoes binary fission. Binary
fission is a process of
a. | asexual reproduction | c. | growth and repair | b. | genetic engineering | d. | sexual
reproduction |
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3.
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The region of a DNA molecule which codes for the formation of a
given protein is called a
a. | chromosome | c. | nucleotide | b. | gene | d. | phenotype |
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4.
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Which of the following best describes the relationship between genes and
chromosomes?
a. | Chromosomes code for genes. | c. | Genes are made of
proteins. | b. | Chromosomes contain genes. | d. | Genes synthesize chromosomes. |
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5.
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Sarah cut her hand which stimulated the process of mitosis to replace the
damaged cells. Human skin cells have 46 chromosomes. How many chromosomes will the new
daughter cells have following mitosis?
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6.
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Which of the following molecules is correctly matched with its
function?
a. | DNA carries the message to the ribosome | c. | rRNA is a structural part of the
ribosome | b. | mRNA carries the amino acids to the ribosome | d. | tRNA contains the genetic code of the
ribosomes |
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7.
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The process of protein synthesis occurs in many steps. Which sequence is
the correct order?
a. | Gene => mRNA=> Protein => Trait | c. | mRNA => Protein=> Gene =>
Trait | b. | Gene => Protein=> mRNA => Trait | d. | Trait => Protein=> mRNA =>
Gene |
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8.
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In eukaryotic cells, when does chromosome or dna replication
occur?
a. | Before mitosis begins | c. | In the last pahse of mitosis | b. | Immediately after
the cell divides | d. | In the
middle of mitosis |
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9.
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If a DNA molecule is composed of 35% cytosine, what percentage of the DNA
molecule is composed of thymine?
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10.
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DNA is composed of ___________________ all linked together to form a double
helix.
a. | amino acids | c. | phosphate groups | b. | nucleotides | d. | sugars |
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11.
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The role of carbohydrates in plants includes which of the
following?
a. | Provides energy and makes up the cell wall | c. | Store energy and makes up cell
membranes | b. | Provides structure and makes up enzymes | d. | Transmit genetic information and speeds up
chemical reactions |
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12.
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Many plants have waxy coatings on some surfaces. This coating reduces water loss
because it does not allow water to pass through. This waxy coating is which of the
following types of organic molecules?
a. | Carbohydrate | c. | Nucleic Acid | b. | Lipid | d. | Protein |
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13.
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Vitamins have important functions in the human body and are necessary for
maintaining good health. Which vitamin is necessary for helping wounds heal?
a. | Vitamin A | c. | Vitamin D | b. | Vitamin C | d. | Vitamin E |
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14.
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Which biochemical process is used by some bacteria to produce food for
themselves using inorganic compounds?
a. | fermentation | c. | chemosynthesis | b. | photosynthesis | d. | replication |
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15.
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Which process involves the transfer of energy from carbohydrates to ATP
molecules?
a. | carbon fixation | c. | chemosynthesis | b. | cellular respiration | d. | photosynthesis |
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16.
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Muscle cells move potassium and sodium into and out of a cell from lower to
higher concentration through protein pumps? This is an example of
a. | active transport | c. | osmosis | b. | facilitated diffusion | d. | passive
transport |
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17.
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A person’s normal glucose level is 100 mg/L. A blood test taken
immediately after a meal revealed a higher glucose level of 165 mg/L. Why would the
person’s glucose blood level return to 100 mg/L a few hours later?
a. | antibody production increased | c. | homeostasis was
restored | b. | circulation increased | d. | the person breathed faster |
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18.
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A chewing insect damages the vascular tissue of a plant stem. This
damage will most directly affect the
a. | conduction of water between roots and leaves | c. | excretion of carbon dioxide by root
cells | b. | diffusion of oxygen between root cells | d. | synthesis of hormones in
roots |
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19.
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The function of the cell wall is to
a. | control movement in and out of a cell | c. | package proteins for
export | b. | give the cell a rigid structure | d. | store carbohydrates for later
use |
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20.
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Some cells such as human nerve and muscle cells contain many more mitochondria
than do other cells, such as skin cells. Why do some cells have more mitochondria than
others? The cells
a. | degrade more proteins | c. | store more nutrients | b. | divide more frequently | d. | use more energy |
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21.
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If an animal cell is placed in distilled water, it will swell and burst.
The bursting of the cell is a result of which biological process?
a. | active transport | c. | enzyme activity | b. | diffusion | d. | osmosis |
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22.
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The primary role of the endocrine system is to
a. | coordinate movement of the body | c. | produce hormones that affect other
parts of the body | b. | defend the body against illness and
infection | d. | remove waste
products from the blood |
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