Question 1

Why are free radicals so dangerous to cells, and how are they dealt with by the body?

Accepted Answer

Free radicals are highly reactive chemic...

Question 2

Why can we say that a cell without a nucleus will ultimately die?

Accepted Answer

Without a nucleus, a cell cannot make proteins, nor can it replace any enzymes or other cell structures (which are continuously recycled). Additionally, such a cell could not replicate.

Question 3

Which of these is an inclusion, not an organelle?

Accepted Answer

A)   melanin
B)   lysosome
C)   microtubule
D)   ciliaE) B) and C)
F) All of the above

Question 4

The main component of the cytosol is ________.

Accepted Answer

A)   proteins
B)   sugars
C)   salts
D)   waterE) C) and D)
F) A) and B)

Question 5

Which statement is the most correct regarding transcription/translation?

Accepted Answer

A)   The nucleotide sequence in a mRNA codon is an exact copy of the DNA triplet that coded for it.
B)   The nucleotide sequence in a mRNA codon is an exact copy of the DNA triplet that coded for it except that uracil is substituted for thymine.
C)   The nucleotide sequence in a tRNA anticodon is an exact copy of the DNA triplet that coded for it.
D)   The nucleotide sequence in a tRNA anticodon is an exact copy of the DNA triplet that coded for it except that uracil is substituted for thymine.E) A) and B)
F) A) and C)

Question 6

Match the following:
A) Late prophase
B) Telophase
C) Metaphase
D) Early prophase
E) Anaphase
-Nuclear membrane and nucleolus disintegrate.

Accepted Answer

The answer of Match the following:
A) Late prophase
B) Telophase
C) Metaphase
D)...

Question 7

Match the following:
A) Late prophase
B) Telophase
C) Metaphase
D) Early prophase
E) Anaphase
-Centrioles move to opposite ends of the cell.

Accepted Answer

The answer of Match the following:
A) Late prophase
B) Telophase
C) Metaphase
D)...

Question 8

The process of discharging particles from inside a cell to the outside is called ________.

Accepted Answer

exocytosis

Question 9

Match the following:
A) Tight junctions
B) Desmosomes
C) Gap junctions
-Present in electrically excitable tissues.

Accepted Answer

The answer of Match the following:
A) Tight junctions
B) Desmosomes
C) Gap...

Question 10

If a tRNA had an AGC anticodon, it could attach to a(n)  ________ mRNA codon.

Accepted Answer

A)   AUG
B)   UCG
C)   TCG
D)   UGAE) A) and D)
F) A) and C)

Question 11

In all living cells hydrostatic and osmotic pressures exist. Define these pressures and explain how they are used in the concept of tonicity of the cell.

Accepted Answer

Hydrostatic pressure is the pressure of ...

Question 12

________ is the division of the cytoplasmic mass into two parts.

Accepted Answer

The answer of ________ is the division of the cytoplasmic...

Question 13

Your patient has the flu and reports 5-6 loose stools a day. He has experienced an isotonic fluid volume loss. Explain what an isotonic fluid loss means.

Accepted Answer

An isotonic fluid vo...

Question 14

Which of these is not a function of the plasma membrane?

Accepted Answer

A)   It is selectively permeable but permits water and gases to cross.
B)   It prevents potassium ions from leaking out and sodium ions from crossing into the cell.
C)   It acts as a site of cell-to-cell interaction and recognition.
D)   It encloses the cell contents in such a way that water I the body is divided into separate compartments.E) A) and D)
F) All of the above

Question 15

Research shows that neurofibrillary tangles associated with the disintegration of microtubules are the primary cause of Alzheimer's disease. If microtubules disintegrate, what then might happen to brain cells?

Accepted Answer

Microtubules determine cell shape and in...

Question 16

Match the following:
A) Tight junctions
B) Desmosomes
C) Gap junctions
-Help prevent molecules from passing through the extracellular space between adjacent cells.

Accepted Answer

The answer of Match the following:
A) Tight junctions
B) Desmosomes
C) Gap...

Question 17

Match the following:
A) Late prophase
B) Telophase
C) Metaphase
D) Early prophase
E) Anaphase
-Chromosomes uncoil to form chromatin.

Accepted Answer

B

Question 18

Microtubules are hollow tubes made of subunits of the protein tubulin.

Accepted Answer

A) True 
 B)False

Question 19

A patient was admitted to the hospital for severe dehydration. Explain what changes occur in extracellular and intracellular fluid compartments during dehydration.

Accepted Answer

Fluid volume deficit occurs when the bod...

Question 20

Figure 3.2
Using Figure 3.2, match the following:
-Hydrophilic portion of phospholipid.

Accepted Answer

The answer of  
Figure 3.2
Using Figure 3.2, match the...

Exam 3: Cells: the Living Units

Why are free radicals so dangerous to cells, and how are they dealt with by the body?

Correct AnswerverifiedFree radicals are highly reactive chemic...View AnswerShow Answer

Why can we say that a cell without a nucleus will ultimately die?

Correct AnswerverifiedWithout a nucleus, a cell cannot make proteins, nor can it replace any enzymes or other cell structures (which are continuously recycled). Additionally, such a cell could not replicate.

Which of these is an inclusion, not an organelle?

Correct AnswerverifiedShow Answer

The main component of the cytosol is ________.

Correct AnswerverifiedShow Answer

Which statement is the most correct regarding transcription/translation?

Correct AnswerverifiedShow Answer

Match the following: A) Late prophase B) Telophase C) Metaphase D) Early prophase E) Anaphase -Nuclear membrane and nucleolus disintegrate.

Correct AnswerverifiedShow Answer

Match the following: A) Late prophase B) Telophase C) Metaphase D) Early prophase E) Anaphase -Centrioles move to opposite ends of the cell.

Correct AnswerverifiedShow Answer

The process of discharging particles from inside a cell to the outside is called ________.

Correct Answerverifiedexocytosis

Match the following: A) Tight junctions B) Desmosomes C) Gap junctions -Present in electrically excitable tissues.

Correct AnswerverifiedShow Answer

If a tRNA had an AGC anticodon, it could attach to a(n) ________ mRNA codon.

Correct AnswerverifiedShow Answer

In all living cells hydrostatic and osmotic pressures exist. Define these pressures and explain how they are used in the concept of tonicity of the cell.

Correct AnswerverifiedHydrostatic pressure is the pressure of ...View AnswerShow Answer

________ is the division of the cytoplasmic mass into two parts.

Correct AnswerverifiedShow Answer

Your patient has the flu and reports 5-6 loose stools a day. He has experienced an isotonic fluid volume loss. Explain what an isotonic fluid loss means.

Correct AnswerverifiedAn isotonic fluid vo...View AnswerShow Answer

Which of these is not a function of the plasma membrane?

Correct AnswerverifiedShow Answer

Research shows that neurofibrillary tangles associated with the disintegration of microtubules are the primary cause of Alzheimer's disease. If microtubules disintegrate, what then might happen to brain cells?

Correct AnswerverifiedMicrotubules determine cell shape and in...View AnswerShow Answer

Match the following: A) Tight junctions B) Desmosomes C) Gap junctions -Help prevent molecules from passing through the extracellular space between adjacent cells.

Correct AnswerverifiedShow Answer

Match the following: A) Late prophase B) Telophase C) Metaphase D) Early prophase E) Anaphase -Chromosomes uncoil to form chromatin.

Correct AnswerverifiedB

Microtubules are hollow tubes made of subunits of the protein tubulin.

Correct AnswerverifiedShow Answer

A patient was admitted to the hospital for severe dehydration. Explain what changes occur in extracellular and intracellular fluid compartments during dehydration.

Correct AnswerverifiedFluid volume deficit occurs when the bod...View AnswerShow Answer

Figure 3.2 Using Figure 3.2, match the following: -Hydrophilic portion of phospholipid.

Correct AnswerverifiedShow Answer

Correct Answer
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Free radicals are highly reactive chemic...
View Answer

Correct Answer
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Without a nucleus, a cell cannot make proteins, nor can it replace any enzymes or other cell structures (which are continuously recycled). Additionally, such a cell could not replicate.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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exocytosis

Correct Answer
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Correct Answer
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Correct Answer
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Hydrostatic pressure is the pressure of ...
View Answer

Correct Answer
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Correct Answer
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An isotonic fluid vo...
View Answer

Correct Answer
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Correct Answer
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Microtubules determine cell shape and in...
View Answer

Correct Answer
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Correct Answer
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B

Correct Answer
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Correct Answer
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Fluid volume deficit occurs when the bod...
View Answer

Correct Answer
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