21: The mitotic spindle first appears during A: prophase B: metaphase C: anaph

21: The mitotic
spindle first appears during

A: prophase
B: metaphase
C: anaphase
D: telophase

22: Chromosomes line
up in the center of the cell during

A: prophase
B: metaphase
C: anaphase

D: telophase

23: During mitosis,
chromosomes begin to separate during

A: prophase
B: metaphase
C: anaphase
D: telophase

24: Which of the
following is true regarding cytoplasmic division?

A: It occurs during the early part of mitosis
B: It is caused by microfilaments that lie beneath the plasma
membrane
C: It begins during metaphasis
D: None of the above

25: Germ cells

A: in humans contain 46 chromosomes
B: are diploid
C: contain half the number of chromosomes of somatic cells
D: None of the above

26: Meiosis

A: occurs in all body cells
B: produces diploid gametes
C: involves two cell divisions
D: is identical to mitosis in all respects

27: Human somatic
cells

A: contain 23 chromosomes from the mother and 23 from the
father
B: are best described as haploid
C: undergo meiotic divisions
D: are genetically identical to germ cells

28: Meiosis I

A: is identical to mitosis
B: lacks a distinct metaphase
C: reduces the number of chromosomes in humans from 46 to 23

D: None of the above

29: In the ovary, the
number of ova produced during meiosis is

A: one
B: two
C: three
D: four

30: The zygote
produced during fertilization

A: divides my meiosis
B: is haploid
C: divides by mitosis
D: None of the above

31: The risk of a
mistaken identity using DNA fingerprinting is _____ compared to a risk of error
in blood typing of 1 in 1000

A: 1 in 4000
B: 1 in 4 million
C: 1 in 4 billion
D: 1 in 4 trillion

32: DNA

A: consists of two polynucleotide strands

B: is identical to RNA except that RNA consists of a single
strand
C: contains two types of bases: purines and pyrimidines
D: a and b
E: a and c

33: A molecule that
is not part of a nucleotide is

A: Phosphate
B: ribose
C: nitrogenous base
D: glucose

34: In DNA, hydrogen
bonds are

A: nonexistent
B: found between the bases on opposing polynucleotide chains

C: found between sugars and phosphates
D: found between the nitrogen bases and sugar molecules

35: The DNA molecule
contains

A: uracil
B: ribose
C: equal numbers of cytosine and thymine
D: contains equal numbers of purines and pyrimidines

36: Viruses

A: are submicroscopic organisms that lack organelles and can
only reproduce inside other cells
B: are structurally very similar to eukaryotic cells
C: are considered living organisms
D: are not attacked by the immune system, which is why they
are so dangerous

37: Bacteria

A: are eukaryotes that lack nuclei
B: are structurally identical to viruses
C: are prokaryotes that lack distinct organelles
D: cause disease

38: Which of the
following is not part of the first line of defense against microorganisms?

A: The skin
B: The lining of the respiratory tract
C: The lining of the intestinal tract
D: The inflammatory response

39: During the
inflammatory response

A: mast cells release histamine, causing the blood vessels
to constrict
B: the release of prostaglandins at the site of the wound
causes pain
C: blood flow to the injured area is reduced to prevent
blood loss
D: all of the above
E: none of the above

40: Pyrogens

A: act on the temperature-regulating region of the
hypothalamus, raising body temperature
B: are chemicals that lower body temperature, thus
protecting the body in case of an invasion by bacteria
C: are one class of interferons
D: increase iron availability, which is detrimental to
bacteria

41:A
student performs an experiment to test the effects of a special diet on the
cholesterol content of chicken eggs. He obtained 20 chickens from two different
breeders. Half of the chickens were fed the special diet, and half were fed a
diet of standard chicken feed, purchased at a local feed store. The student
found that cholesterol levels in the eggs from chickens fed the special diet
were lower than the levels found in the eggs of the other group, and he
concludes that his special diet should be marketed to farmers. Do you see any
problems with this study? How would you improve the design?
42:
If you were considering becoming a strict vegetarian, eating no animal
products, even milk or eggs, how would you be assured of getting all of the amino
acids your body needs? What specific dietary components (not
vitamin supplements) would your body require?
43: Give two examples of negative feedback loops in the endocrine
system: 1) a simple feedback mechanism, and 2) a more complex one that operates
through the nervous system.
44: Why is the heart described as a
double pump? Describe the general structure of arteries and veins. How are they
similar? How are they different? How do arteries and veins (and the blood they
carry) contribute to homeostasis?
45: The immune system in the human body consists
of three lines of defense. What are they and how do they operate?

46: Explain the difference between active and
passive immunity and give an example of each.

47: Your friend is thinking about using
anabolic steroids to improve his gymnastics performance. He argues that he is
young and will only be taking the drug for a year or so. What are three
“pros” and three “cons” associated with using steroids?
What final advice would you give him based on your data?

21: The mitotic
spindle first appears duringA: prophaseB: metaphaseC: anaphaseD: telophase 22: Chromosomes line
up in the center of the cell duringA: prophaseB: metaphaseC: anaphaseD: telophase 23: During mitosis,
chromosomes begin to separate duringA: prophaseB: metaphaseC: anaphaseD: telophase 24: Which of the
following is true regarding cytoplasmic division?A: It occurs during the early part of mitosisB: It is caused by microfilaments that lie beneath the plasma
membraneC: It begins during metaphasisD: None of the above 25: Germ cellsA: in humans contain 46 chromosomesB: are diploidC: contain half the number of chromosomes of somatic cellsD: None of the above26: MeiosisA: occurs in all body cellsB: produces diploid gametesC: involves two cell divisionsD: is identical to mitosis in all respects 27: Human somatic
cellsA: contain 23 chromosomes from the mother and 23 from the
fatherB: are best described as haploidC: undergo meiotic divisionsD: are genetically identical to germ cells 28: Meiosis IA: is identical to mitosisB: lacks a distinct metaphaseC: reduces the number of chromosomes in humans from 46 to 23
D: None of the above 29: In the ovary, the
number of ova produced during meiosis isA: oneB: twoC: threeD: four 30: The zygote
produced during fertilizationA: divides my meiosisB: is haploidC: divides by mitosisD: None of the above31: The risk of a
mistaken identity using DNA fingerprinting is _____ compared to a risk of error
in blood typing of 1 in 1000A: 1 in 4000B: 1 in 4 millionC: 1 in 4 billionD: 1 in 4 trillion 32: DNAA: consists of two polynucleotide strandsB: is identical to RNA except that RNA consists of a single
strandC: contains two types of bases: purines and pyrimidinesD: a and bE: a and c33: A molecule that
is not part of a nucleotide isA: PhosphateB: riboseC: nitrogenous baseD: glucose 34: In DNA, hydrogen
bonds areA: nonexistentB: found between the bases on opposing polynucleotide chains
C: found between sugars and phosphatesD: found between the nitrogen bases and sugar molecules 35: The DNA molecule
containsA: uracilB: riboseC: equal numbers of cytosine and thymineD: contains equal numbers of purines and pyrimidines36: VirusesA: are submicroscopic organisms that lack organelles and can
only reproduce inside other cellsB: are structurally very similar to eukaryotic cellsC: are considered living organismsD: are not attacked by the immune system, which is why they
are so dangerous 37: BacteriaA: are eukaryotes that lack nucleiB: are structurally identical to virusesC: are prokaryotes that lack distinct organellesD: cause disease 38: Which of the
following is not part of the first line of defense against microorganisms?A: The skinB: The lining of the respiratory tractC: The lining of the intestinal tractD: The inflammatory response 39: During the
inflammatory responseA: mast cells release histamine, causing the blood vessels
to constrictB: the release of prostaglandins at the site of the wound
causes painC: blood flow to the injured area is reduced to prevent
blood lossD: all of the aboveE: none of the above40: PyrogensA: act on the temperature-regulating region of the
hypothalamus, raising body temperatureB: are chemicals that lower body temperature, thus
protecting the body in case of an invasion by bacteriaC: are one class of interferonsD: increase iron availability, which is detrimental to
bacteria41:A
student performs an experiment to test the effects of a special diet on the
cholesterol content of chicken eggs. He obtained 20 chickens from two different
breeders. Half of the chickens were fed the special diet, and half were fed a
diet of standard chicken feed, purchased at a local feed store. The student
found that cholesterol levels in the eggs from chickens fed the special diet
were lower than the levels found in the eggs of the other group, and he
concludes that his special diet should be marketed to farmers. Do you see any
problems with this study? How would you improve the design?42:
If you were considering becoming a strict vegetarian, eating no animal
products, even milk or eggs, how would you be assured of getting all of the amino
acids your body needs? What specific dietary components (not
vitamin supplements) would your body require? 43: Give two examples of negative feedback loops in the endocrine
system: 1) a simple feedback mechanism, and 2) a more complex one that operates
through the nervous system.44: Why is the heart described as a
double pump? Describe the general structure of arteries and veins. How are they
similar? How are they different? How do arteries and veins (and the blood they
carry) contribute to homeostasis?45: The immune system in the human body consists
of three lines of defense. What are they and how do they operate?46: Explain the difference between active and
passive immunity and give an example of each.47: Your friend is thinking about using
anabolic steroids to improve his gymnastics performance. He argues that he is
young and will only be taking the drug for a year or so. What are three
“pros” and three “cons” associated with using steroids?
What final advice would you give him based on your data?