Question 1

Which of the following gives rise to both lysosomes and vesicles?

Accepted Answer

A)   rough endoplasmic reticulum
B)   mitochondria
C)   Golgi apparatus
D)   ribosomes

Question 2

As they flow over rotten logs as a fluid sheet, slime molds appear to lack any partitioning into individual cells; however, slime molds do become cellular when they change form to produce spores. The surface of some parasitic flatworms and some insect tissues are a "syncytium" or layer of living material that contains many nuclei and cell organelles but lacks partitioning by cell membranes. These tissues consume food and produce wastes. In light of the cell theory that "all living things are composed of cells," then

Accepted Answer

A)   these tissues are not living because they are not cellular.
B)   these tissues are obviously a bridge between nonliving and primitive living cells.
C)   the general concept of life-is-cellular still holds because these organisms are cellular at specific stages in their life cycle, but this shows that cell membrane partitions can be abandoned.
D)   this proves that a "vital force" beyond cell chemistry can give life to substances.
E)   All of the choices are true.

Question 3

If a researcher was interested in slowing down the movement of amoebas by disrupting their cell membranes, which protein filaments should she be studying?

Accepted Answer

A)   actin
B)   intermediates
C)   microtubules
D)   myosin

Question 4

During the sequencing of DNA into a protein, what is the first step?

Accepted Answer

A)   mRNA is copied from a gene
B)   a ribosome attaches to the mRNA and signals protein synthesis
C)   SRP binds to the signal peptide to shut down synthesis
D)   an enzyme removes the signal peptide from the peptide chain

Question 5

The cells that line our respiratory tract, and one-celled paramecia both have these short hair-like projections.

Accepted Answer

A)   flagella
B)   microfilaments
C)   centrioles
D)   cilia
E)   pili

Question 6

Which of the following is NOT offered as evidence in support of the endosymbiotic theory, the belief that a eukaryotic cell has evolved as a "committee" of prokaryotic cells?

Accepted Answer

A)   Mitochondria and chloroplasts are similar in size and structure to some species of bacteria.
B)   The ribosomes of chloroplasts and mitochondria are similar to bacteria.
C)   Mitochondria and chloroplasts can actively break away from eukaryotic cells and live on their own.
D)   Mitochondria and chloroplasts have their own DNA coding separate from the eukaryotic nucleus.
E)   All of the choices offer support of the endosymbiotic theory.

Question 7

What structures enable the vesicles from the Golgi apparatus to fuse with the cell membrane? 5-2-2013

Accepted Answer

A)   membrane-associated proteins
B)   phospholipids
C)   cholesterol molecules within the cell membrane
D)   secretory vesicles that engulf the Golgi apparatus will allow the vesicles to fuse

Question 8

Which is a true statement about ribosomes?

Accepted Answer

A)   Ribosomes contain DNA and protein.
B)   Ribosomes are active in carbohydrate synthesis.
C)   Ribosomal subunits leave the nucleus after being formed by the nucleolus.
D)   Polyribosomes are the subunits of ribosomes.
E)   Ribosomes are only found associated with the endoplasmic reticulum in prokaryotic cells.

Question 9

Which of these is NOT part of the endomembrane system of the cell?

Accepted Answer

A)   mitochondria
B)   endoplasmic reticulum
C)   lysosomes
D)   Golgi complex

Question 10

Which statement is NOT true about bacterial anatomy?

Accepted Answer

A)   The cell wall is located outside of the plasma membrane.
B)   The glycocalyx sheath is located inside the cell wall.
C)   There may be small rings of accessory DNA called plasmids.
D)   Bacteria may have fimbriae that help attach the bacteria to other structures.

Question 11

Why is a large surface area: volume ratio needed for cells to function properly?

Accepted Answer

A)   Adequate surface area (plasma membrane)  is needed to furnish nutrients to and expel wastes from the volume (cytoplasm) .
B)   Smaller volumes reduce and larger surface areas reduce the cell's ability to bring nutrients in and get rid of waste.
C)   A smaller surface area allows the cell to increase its metabolic activity by bringing in even more nutrients than larger surface areas.
D)   The surface area and volume increase at the rate to ensure cell growth and reproduction.

Question 12

Membrane-bounded vesicles that contain enzymes for oxidizing small organic molecules with the formation of hydrogen peroxide are

Accepted Answer

A)   vacuoles.
B)   vesicles.
C)   glyoxisomes.
D)   lysosomes.
E)   peroxisomes.

Question 13

Without a cytoskeleton, eukaryotic cells would NOT

Accepted Answer

A)   synthesize protein.
B)   have an efficient way to transport materials from one organelle to another.
C)   have an efficient means of metabolism.
D)   communicate with adjacent cells.

Question 14

Which of the following products can be found in vacuoles?

Accepted Answer

A)   water
B)   sugars
C)   water-soluble pigments
D)   all of these are found in vacuoles

Question 15

Which organelle is primarily responsible for the breakdown of lipids within the cell?

Accepted Answer

A)   Golgi apparatus
B)   chloroplast
C)   vacuole
D)   peroxisome

Question 16

From your knowledge of the size and density of cell components and the process of centrifugation, predict the order (from first to last)  that the nucleus and various cell organelles will be extracted?

Accepted Answer

A)   ribosomes-mitochondria and chloroplasts-nucleus-soluble cytoplasm
B)   nucleus-mitochondria and chloroplasts-ribosomes-soluble cytoplasm
C)   nucleus-mitochondria and chloroplasts-soluble cytoplasm-ribosomes
D)   mitochondria and chloroplasts-nucleus-soluble cytoplasm-ribosomes
E)   soluble cytoplasm-ribosomes-mitochondria and chloroplasts-nucleus

Question 17

Which cytoskeletal element is NOT correctly associated with its characteristic?

Accepted Answer

A)   Cilia are small extensions of membrane-surrounded microtubules.
B)   Microtubules are made up of a globular protein called tubulin.
C)   Centrioles are found in the microtubule organizing centers of plants.
D)   Flagella have a 9 + 2 pattern of microtubule structure.
E)   Basal bodies are located at the base of cilia and flagella.

Question 18

Each time the water in a cell freezes slowly, long sharp crystals spear through the membrane structures of the cell. However, in the frozen state, virtually no chemical reactions occur. The most likely explanation for the bad taste of meat that has "freezer burn" from repeated freezing is the destruction of

Accepted Answer

A)   the Golgi bodies and their vesicles.
B)   lysosomes and resultant autodigestion.
C)   rough endoplasmic reticulum causing the release of ribosomes.
D)   ribosomes causing them to break into subunits.
E)   the nuclear membrane causing mixing of nucleoplasm and cytoplasm.

Exam 4: Cell Structure and Function

Correct Answer
verified

Which organelle is primarily responsible for the breakdown of lipids within the cell?

Correct Answer
verified

Which statement is NOT true about bacterial anatomy?

Correct Answer
verified

Which is a true statement about ribosomes?

Correct Answer
verified

Without a cytoskeleton, eukaryotic cells would NOT

Correct Answer
verified

Which of the following is NOT offered as evidence in support of the endosymbiotic theory, the belief that a eukaryotic cell has evolved as a "committee" of prokaryotic cells?

Correct Answer
verified

The cells that line our respiratory tract, and one-celled paramecia both have these short hair-like projections.

Correct Answer
verified

If a researcher was interested in slowing down the movement of amoebas by disrupting their cell membranes, which protein filaments should she be studying?

Correct Answer
verified

Which cytoskeletal element is NOT correctly associated with its characteristic?

Correct Answer
verified

During the sequencing of DNA into a protein, what is the first step?

Correct Answer
verified

Which of the following products can be found in vacuoles?

Correct Answer
verified

Which of these is NOT part of the endomembrane system of the cell?

Correct Answer
verified

What structures enable the vesicles from the Golgi apparatus to fuse with the cell membrane? 5-2-2013

Correct Answer
verified

Correct Answer
verified

Why is a large surface area: volume ratio needed for cells to function properly?

Correct Answer
verified

Which of the following gives rise to both lysosomes and vesicles?

Correct Answer
verified

Membrane-bounded vesicles that contain enzymes for oxidizing small organic molecules with the formation of hydrogen peroxide are

Correct Answer
verified

From your knowledge of the size and density of cell components and the process of centrifugation, predict the order (from first to last) that the nucleus and various cell organelles will be extracted?

Correct Answer
verified

Exam 4: Cell Structure and Function

Correct AnswerverifiedShow Answer

Which organelle is primarily responsible for the breakdown of lipids within the cell?

Correct AnswerverifiedShow Answer

Which statement is NOT true about bacterial anatomy?

Correct AnswerverifiedShow Answer

Which is a true statement about ribosomes?

Correct AnswerverifiedShow Answer

Without a cytoskeleton, eukaryotic cells would NOT

Correct AnswerverifiedShow Answer

Which of the following is NOT offered as evidence in support of the endosymbiotic theory, the belief that a eukaryotic cell has evolved as a "committee" of prokaryotic cells?

Correct AnswerverifiedShow Answer

The cells that line our respiratory tract, and one-celled paramecia both have these short hair-like projections.

Correct AnswerverifiedShow Answer

If a researcher was interested in slowing down the movement of amoebas by disrupting their cell membranes, which protein filaments should she be studying?

Correct AnswerverifiedShow Answer

Which cytoskeletal element is NOT correctly associated with its characteristic?

Correct AnswerverifiedShow Answer

During the sequencing of DNA into a protein, what is the first step?

Correct AnswerverifiedShow Answer

Which of the following products can be found in vacuoles?

Correct AnswerverifiedShow Answer

Which of these is NOT part of the endomembrane system of the cell?

Correct AnswerverifiedShow Answer

What structures enable the vesicles from the Golgi apparatus to fuse with the cell membrane? 5-2-2013

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Why is a large surface area: volume ratio needed for cells to function properly?

Correct AnswerverifiedShow Answer

Which of the following gives rise to both lysosomes and vesicles?

Correct AnswerverifiedShow Answer

Membrane-bounded vesicles that contain enzymes for oxidizing small organic molecules with the formation of hydrogen peroxide are

Correct AnswerverifiedShow Answer

From your knowledge of the size and density of cell components and the process of centrifugation, predict the order (from first to last) that the nucleus and various cell organelles will be extracted?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified