Multiple Choice Identify the
choice that best completes the statement or answers the question.
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1.
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In DNA copying, the bonds between the nitrogen bases are broken by a(n)
____.
a. | hormone | c. | RNA | b. | enzyme | d. | cytoplasm |
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2.
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Animal cells do NOT have ____.
a. | centrioles | c. | cell plates/walls | b. | centromeres | d. | cytoplasm |
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3.
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Most of the life of any cell is spent in a period of growth called ____.
a. | interphase | c. | telophase | b. | prophase | d. | anaphase |
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4.
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Which of the following does not occur in plant cell mitosis, but does occur in
animal cell mitosis?
a. | spindle fibers form | c. | cell walls form | b. | centrioles form | d. | cell plate
forms |
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5.
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The chromosomes in the nucleus of a cell contain a code known as ____.
a. | RNA | c. | meiosis | b. | mitosis | d. | DNA |
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6.
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DNA does NOT contain the nitrogen base ____.
a. | adenine | c. | uracil | b. | cytosine | d. | thymine |
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7.
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A cell that has two of every kind of chromosome is ____.
a. | haploid | c. | an egg | b. | diploid | d. | a sperm |
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8.
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Haploid numbers of chromosomes are usually found in the ____ of an
organism.
a. | tissues | c. | reproductive cells | b. | body cells | d. | zygotes |
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9.
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Each human skin cell has ____ pairs of chromosomes.
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10.
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Hydra reproduce by ____.
a. | budding | c. | regeneration | b. | fission | d. | fussion |
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11.
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In ____ a body part regrows and may form a new organism.
a. | fission | c. | regeneration | b. | budding | d. | fusion |
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Matching
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Match each term with the correct description below. a. | mitosis | d. | eggs | b. | fertilization | e. | meiosis | c. | zygote | f. | sperm |
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12.
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reproductive cells from female reproductive organ
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13.
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reproductive cells from male reproductive organ
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14.
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only takes place in reproductive organs
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15.
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cell that forms in fertilization
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16.
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joining of two reproductive cells
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17.
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takes place in body cells
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Completion Complete each
statement.
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18.
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The process of nuclear division that produces haploid reproductive cells is
____________________.
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19.
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A strand of DNA has the following order of bases: CGTATCGA. The corresponding
order of bases in the matching RNA will be ____________________.
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20.
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Two reproductive cells join to produce a new individual in ____________________
reproduction.
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21.
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The amount of adenine in DNA always equals the amount of
____________________.
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22.
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DNA copying occurs during ____________________.
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23.
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The codes for making proteins are carried from the nucleus to the ribosomes in
the cytoplasm by ____________________.
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24.
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Bacterial cells reproduce by ____________________.
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25.
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Budding and regeneration are two types of ____________________
reproduction.
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26.
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Mitosis is defined as division of a(n) ____________________.
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27.
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In ____________________ reproduction, organisms are produced from only one
parent.
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28.
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During the ____________________ step of mitosis, the cytoplasm begins to divide
and two new identical cells form.
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29.
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During the ____________________ step of mitosis, the centromere of each pair of
chromatids becomes attached to two spindle fibers.
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30.
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Reproductive cells differ from body cells in that they do not have
____________________ of chromosomes.
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31.
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RNA structure differs from DNA in that it contains the nitrogen base
____________________ in place of thymine.
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32.
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The joining of an egg and a sperm is called ____________________.
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33.
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The abbreviation tRNA stands for ____________________ RNA.
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34.
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Reproduction that involves two organisms relies on meiosis instead of mitosis
because only meiosis produces ____________________ reproductive cells.
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Short Answer
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35.
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Why are bacteria unable to undergo mitosis?
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36.
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A single cell undergoes mitosis every five minutes. How many cells will result
from this cell in 15 minutes? In 30 minutes?
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37.
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Describe the end products of a single episode of meiosis?
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38.
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How do nerve and muscle cells differ from other body cells?
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39.
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A human has 46 chromosomes in each body cell. How many chromosomes does each egg
cell have?
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40.
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Why is it important for egg and sperm cells to join in fertilization?
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41.
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Why can't an egg or a sperm cell alone develop into a new
individual?
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42.
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What steps of meiosis are similar to which steps of mitosis?
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43.
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How is the cytoplasm divided between the two cells that result from mitosis in
plant cells? In animal cells?
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44.
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How can mutations occur in cells?
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45.
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What is the difference between messenger RNA and transfer RNA?
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46.
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Who was responsible for discovering the structure of DNA?
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47.
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What would happen if a cell divided before the chromosomes were
duplicated?
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48.
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Describe the structure of DNA.
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49.
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Beginning with interphase, use the letters to order the following
events: A
prophase B
telophase C
metaphase D
interphase E anaphase
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50.
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Order the steps of DNA copying listed below: A Bases attached to each strand pair up
with bases in cytoplasm. B Sugar and phosphate groups bond to
form sides of new DNA strands. C Enzyme breaks bonds and DNA
strands unwind and separate.
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