Practice Quiz for
Basic Cell Structures

No. of Questions= 12
INSTRUCTIONS: To answer a question, click the button in front of your choice. A response will appear in the window below the question to let you know if you are correct. Be sure to read the feedback. It is designed to help you learn the material. You can also learn by reading the feedback for incorrect answers.

1 Which of the following statements about living cells is false?
a) Most are microscopic
b) They are found in all animals but not in all plants.
c) They are the smallest basic units that can carry out all of the functions that we normally define as life.
2 Chromosomes are found in _____________________ of cells.
a) the nucleus
b) the cytoplasm
c) both the nucleus and the cytoplasm
3 Which of the following statements is true about the chromosomes of different plant and animal species?
a) They may differ in number, but are the same shape and size.
b) They may differ in the shape and size, but normally have the same number.
c) They may differ in number, shape, and size.
4 Which of the following statements is true about cells?
a) The nucleus is within the cell membrane which is surrounded by the nuclear membrane.
b) The nucleus is within the nuclear membrane which is surrounded by the cytoplasm.
c) The cytoplasm is within the nuclear membrane.
5 A karyotype is a:
a) general term for any type of chromosome
b) type of abnormal chromosome that is associated with Down's syndrome
c) picture of an individual's chromosomes arranged in a standardized way
6 The sex chromosomes of normal females are:
a) X and Y
b) Y and Y
c) X and X
d) none of the above
7 The genes on the sex chromosomes of females are ___________ and those of males are mostly ___________ .
a) homologous; homologous
b) homologous; hemizygous
c) hemizygous; hemizygous
8 Autosomes:
a) are all chromosomes other than the sex chromosomes
b) are normal sex chromosomes
c) automatically determine the sex of children
9 Normal humans have __________ pairs of autosomes and ___________ pair(s) of sex chromosomes.
a) 23 and 23
b) 23 and 2
c) 46 and 1
d) 22 and 1
10 All of the chromosomes in each normal human cell collectively have approximately __________ genes.
a) 10,000-15,000
b) 20,000-25,000
c) 242,000
d) 1,000,000
11 A chromatid is:
a) one of the strands or arms of a chromosome
b) the point of attachment of two strands of a chromosome
c) a chromosome before it becomes visible during cell division
12 The development of masculine physical characteristics is most affected by the inheritance of:
a) an X chromosome
b) a karyotype
c) the SRY gene



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