Question 1

The components of ribosomes are synthesized by

Accepted Answer

A)  the endoplasmic reticulum.
B)  Golgi complexes.
C)  lysosomes.
D)  mitochondria.
E)  nucleoli.

Question 2

How is genetic information coded in the cell?

Accepted Answer

A)  Genetic information is coded in the order of ribosomes on RER.
B)  Genetic information is coded by the orientation of the microtubules of the cytoskeleton.
C)  Genetic information is coded by the sequence of nucleotides in DNA.
D)  Genetic information is coded by the proteins produced by the RER.
E)  Genetic information is coded by the lysosomes.

Question 3

Transfer of mRNA from the nucleus to the cytosol occurs through

Accepted Answer

A)  tRNA.
B)  DNA.
C)  endocytosis.
D)  exocytosis.
E)  nuclear pores.

Question 4

Which type of RNA links the genetic information in the nucleus with the cytoplasmic sites of protein synthesis?

Accepted Answer

A)  transfer RNA
B)  coding RNA
C)  ribosomal RNA
D)  codon RNA
E)  messenger RNA

Question 5

What is a chromatid,and how many are present during normal mitosis in a human cell?

Accepted Answer

A)  A chromatid is a copy of a duplicated chromosome,and 23 are present.
B)  A chromatid is a copy of a duplicated chromosome,and 46 are present.
C)  A chromatid is a copy of a duplicated chromosome,and 92 are present.
D)  A chromatid is where spindle fibers attach,and 46 are present.
E)  A chromatid is where spindle fibers attach,and 92 are present.

Question 6

Define cellular differentiation.

Accepted Answer

Cellular differentiation is the developm...

Question 7

In cells that are not dividing,chromosomes uncoil to form a tangle of fine fibers known as

Accepted Answer

A)  nucleosomes.
B)  centromeres.
C)  chromatids.
D)  chromatin.
E)  nucleoli.

Question 8

Facilitated diffusion differs from ordinary diffusion in that

Accepted Answer

A)  facilitated diffusion consumes no ATP.
B)  facilitated diffusion moves molecules from an area of higher concentration to lower concentration.
C)  the rate of molecular movement is limited by the number of available carrier molecules.
D)  facilitated diffusion never eliminates the concentration gradient.
E)  the rate of molecular movement is not limited by the number of available carrier molecules.

Question 9

Compare and contrast the structure of SER and RER.

Accepted Answer

Both SER and RER have cisterna...

Question 10

An alternate term for tumor is

Accepted Answer

A)  neoplasm.
B)  cytoplasm.
C)  benign malignancy.
D)  primary metastasis.
E)  nucleoplasm.

Question 11

Which of the following is an example of a membranous organelle?

Accepted Answer

A)  microvilli
B)  cilia
C)  centrioles
D)  ribosomes
E)  mitochondria

Question 12

Describe endocytosis.

Accepted Answer

A)  Endocytosis occurs when a vesicle forms at the plasma membrane,encloses a large volume of extracellular fluid and contents,and then moves into the cytoplasm.
B)  Endocytosis occurs when a vesicle forms inside the cell,encloses a large volume of intracellular fluid and contents,and then fuses with the plasma membrane to release it outside the cell.
C)  Endocytosis occurs when water moves through aquaporin channels into a cell.
D)  Endocytosis occurs when molecules are pumped against their concentration gradient into the cell.
E)  Endocytosis occurs when ions pass through channel proteins to enter the cell.

Question 13

The movement of oxygen from an area of high concentration to an area of low concentration is an example of

Accepted Answer

A)  osmosis.
B)  active transport.
C)  diffusion.
D)  facilitated transport.
E)  filtration.

Question 14

Which organelles are involved in membrane flow? Trace the route of a single integral membrane protein from formation to incorporation into the plasma membrane.

Accepted Answer

With the exception of mitochondria,all m...

Question 15

Microfilaments

Accepted Answer

A)  are usually composed of myosin.
B)  are hollow,filamentous structures.
C)  anchor the cytoskeleton to the plasma membrane.
D)  are about 25 nm in diameter.
E)  are found in the cytoplasm radiating away from the centrosome.

Question 16

When a person receives intravenous fluids to help build up blood volume,why is it important for the fluid to be isotonic?

Accepted Answer

Intravenous fluids must be isotonic to p...

Question 17

Which of the following organelles has ribosomes bound to its membrane?

Accepted Answer

A)  plasma membrane
B)  nucleus
C)  mitochondria
D)  smooth endoplasmic reticulum
E)  rough endoplasmic reticulum

Question 18

In describing parts of the mitochondrion,folds are to cristae as the contained fluid is to

Accepted Answer

A)  actin.
B)  microvilli.
C)  cytosol.
D)  basal body.
E)  matrix.

Question 19

Name the substrates and product in the enzymatic reaction catalyzed by RNA polymerase.

Accepted Answer

A)  The substrates are DNA nucleotides,and the product is a strand of mRNA.
B)  The substrates are DNA nucleotides,and the product is a strand of cDNA.
C)  The substrates are RNA nucleotides,and the product is a strand of mRNA.
D)  The substrates are RNA nucleotides,and the product is a strand of cDNA.
E)  The substrates are DNA nucleotides,and the product is a DNA double helix.

Question 20

Messenger RNA is vital to the cell because

Accepted Answer

A)  mRNA can leave the nucleus.
B)  mRNA cannot leave the nucleus.
C)  DNA can leave the nucleus.
D)  DNA cannot leave the nucleus.
E)  mRNA can leave the nucleus,and DNA cannot leave the nucleus.

Exam 3: Cellular Level of Organization

Messenger RNA is vital to the cell because

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Describe endocytosis.

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Facilitated diffusion differs from ordinary diffusion in that

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When a person receives intravenous fluids to help build up blood volume,why is it important for the fluid to be isotonic?

Correct AnswerverifiedIntravenous fluids must be isotonic to p...View AnswerShow Answer

Compare and contrast the structure of SER and RER.

Correct AnswerverifiedBoth SER and RER have cisterna...View AnswerShow Answer

What is a chromatid,and how many are present during normal mitosis in a human cell?

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Which of the following is an example of a membranous organelle?

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Microfilaments

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The movement of oxygen from an area of high concentration to an area of low concentration is an example of

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An alternate term for tumor is

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Which of the following organelles has ribosomes bound to its membrane?

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The components of ribosomes are synthesized by

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Transfer of mRNA from the nucleus to the cytosol occurs through

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In describing parts of the mitochondrion,folds are to cristae as the contained fluid is to

Correct AnswerverifiedShow Answer

Which organelles are involved in membrane flow? Trace the route of a single integral membrane protein from formation to incorporation into the plasma membrane.

Correct AnswerverifiedWith the exception of mitochondria,all m...View AnswerShow Answer

In cells that are not dividing,chromosomes uncoil to form a tangle of fine fibers known as

Correct AnswerverifiedShow Answer

Name the substrates and product in the enzymatic reaction catalyzed by RNA polymerase.

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Which type of RNA links the genetic information in the nucleus with the cytoplasmic sites of protein synthesis?

Correct AnswerverifiedShow Answer

Define cellular differentiation.

Correct AnswerverifiedCellular differentiation is the developm...View AnswerShow Answer

How is genetic information coded in the cell?

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Intravenous fluids must be isotonic to p...
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Correct Answer
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Both SER and RER have cisterna...
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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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With the exception of mitochondria,all m...
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Correct Answer
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Correct Answer
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Correct Answer
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Cellular differentiation is the developm...
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Correct Answer
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