McCance Pathophysiology chapter 1 sample questions and answers

McCance Pathophysiology chapter
1 sample questions and answers

Chapter 1: Cellular Biology
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MULTIPLE CHOICE ji




ji 1. Which statement best describes the cellular function of metabolic
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ji absorption?



a.

Cells can produce proteins.
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b.

Cells can secrete digestive enzymes.
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c.

Cells can take in and use nutrients.
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d.

Cells can synthesize fats. - (Correct Answer) ANS: C
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In metabolic absorption, all cells take in and use nutrients and other
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substances from their surroundings. The remaining options are not
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inclusive in their descriptions of cellular metabolic absorption.
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2. Most of a cell's genetic information, including RNA and DNA, is
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contained in the:
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a.

Mitochondria

b.

Ribosome

c.

Nucleolus

d.

Lysosome - (Correct Answer) ANS: C ji ji ji ji ji




The nucleus contains the nucleolus, a small dense structure
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composed largely of RNA, most of the cellular DNA, and the DNA-
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binding proteins, such as the histones, which regulate its activity. The
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other options do not contain most of a cell's genetic information.
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3. Which component of the cell produces hydrogen peroxide (H2O2)
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by using oxygen to remove hydrogen atoms from specific substrates
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in an oxidative reaction?
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a.

Lysosomes



b.

Peroxisomes

, c.

Ribosomes



d.

Oxyhydrosomes - (Correct Answer) ANS: B ji ji ji ji ji




Peroxisomes are so named because they usually contain enzymes ji ji ji ji ji ji ji ji




that use oxygen to remove hydrogen atoms from specific substrates
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in an oxidative reaction that produces H2O2, which is a powerful
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oxidant and potentially destructive if it accumulates or escapes from
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peroxisomes. Ribosomes are RNA-protein complexes
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(nucleoproteins) that are synthesized in the nucleolus and secreted
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into the cytoplasm through pores in the nuclear envelope called
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nuclear pore complexes. Lysosomes are saclike structures that
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originate from the Golgi complex and contain more than 40 digestive
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enzymes called hydrolases, which catalyze bonds in proteins, lipids,
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nucleic acids, and carbohydrates. Oxyhydrosomes are involved in
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enzyme production.
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4. Which cell component is capable of cellular autodigestion when it is
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released during cell injury?
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a. Ribosome
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b. Golgi complex
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c. Smooth endoplasmic reticulum
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d. Lysosomes - (Correct Answer) ANS: D
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