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Chapter 6 Tour of the Cell Mastering AP Biology

front 1

Match

Definitions:

Across

Two

Water

Body

Little, Small

Color

Between

Pre/fix, Root words:

Aqu- (or Aqua-)

-Elle

Chrom-

Bi-

-Some (or Soma-)

Trans-

Inter-

back 1

Across: trans-

Two: Bi-

Water: Aqu- (or Aqua-)

Body: -Some (or Soma-)

Little, Small: -Elle

Color: Chrom-

Between: Inter-

front 2

Matching

Definition:

Inside, Inner

Thread

Cell

Green

Out of

True, good

Without, lack of, not

Pre/fix, Root words:

Chloro-

Ex-

Endo-

-Cyte (or cyto-)

A- (or An-)

Eu-

Mito-

back 2

Inside, Inner: Endo-

Thread: Mito-

Cell: -Cyte (or cyto-)

Green: Chloro-

Out of: Ex-

True, good: Eu-

Without, lack of, not: A- (or An-)

front 3

Matching

Definition:

Below, less than

Same

Eat

Above, greater than

Formed substance

Small

Leaf

Pre/fix, Root words:

Hyper-

Phyll-

Sym-

Phago-

- Plasm

Hypo-

Micro-

back 3

Below, less than: Hypo-

Same: Sym-

Eat: Phago-

Above, greater than: Hyper-

Formed substance: -Plasm

Small: Micro-

Leaf: -Phyll

front 4

Beginning within the nucleus, the first step leading to the synthesis of a polypeptide is _____.

A. Translation of an RNA nucleotide sequence into a sequence of amino acids

B. Transferring of information from DNA to messenger RNA

C. Removal of introns from RNA and the stitching together of exons

D. Linking of nucleotides to form a polypeptide

E. Translation of a DNA nucleotide sequence into a sequence of amino acids

back 4

B. Transferring of information from DNA to messenger RNA

front 5

Pancreatic cells, which secrete a large amount of digestive enzymes, are labeled with radioactive leucine and then chased for several hours with nonradioactive leucine. Photographic emulsions are prepared at different times during the chase. Where would the black spots appear on an emulsion prepared 3 hours after the pulse?

A. Golgi apparatus

B. Secretory vesicles

C. Exterior of the cell

D. Rough ER

back 5

C. Exterior of the cell

front 6

What path does a protein in the secretory pathway take, starting from its site of synthesis?

A. Rough ER, Golgi apparatus, secretory vesicles, plasma membrane

B. Plasma membrane, secretory vesicles, Golgi apparatus, rough ER

C. Rough ER, secretory vesicles, Golgi apparatus, plasma membrane

D. Golgi apparatus, rough ER, secretory vesicles, plasma membrane

back 6

A. Rough ER, Golgi apparatus, secretory vesicles, plasma membrane

front 7

During a pulse-chase experiment, photographic emulsions were prepared at different times during the chase, and radioactive spots were detected at the following times and locations: 5 minutes: rough ER; 10 minutes: Golgi apparatus; 40 minutes: endosomes; 70 minutes: lysosomes; 140 minutes: lysosomes. Which of the following conclusions can be drawn from these results?

A. The final destination of the proteins was the lysosome.

B. The proteins were secreted.

C. The proteins traveled from lysosomes to endosomes.

D. The proteins did not travel through the Golgi apparatus.

back 7

A. The final destination of the proteins was the lysosome.

front 8

What scientific hypotheses can be tested by a pulse-chase experiment?

A. Movement of molecules through a cell over time

B. Molecular zip code of a protein

C. Solubility of a molecule

D. The steady-state amount of protein in a cell

back 8

A. Movement of molecules through a cell over time

front 9

True or false? Proteins produced during the "chase" phase of a pulse–chase experiment are labeled with radioactive material.

True or False

back 9

False

front 10

What is the first step in a pulse-chase experiment?

A. Preparing cells for electron microscopy

B. Examining cells for the location of the labeled molecules

C. Incubating cells with an unlabeled molecule

D. Incubating cells with a labeled molecule

back 10

D. Incubating cells with a labeled molecule

front 11

_____ are surface appendages that allow a bacterium to stick to a surface.

A. Flagella

B. Ribosomes

C. Cell walls

D. Fimbriae

E. Mitochondria

back 11

D. Fimbriae

front 12

What is the function of a bacterium's capsule?

A. Protein synthesis

B. Adhesion

C. DNA storage

D. Protection

E. Propulsion

back 12

D. Protection

front 13

The DNA-containing region of this bacterial cell is indicated by the letter _____.

A. A

B. B

C. C

E. E

back 13

D. D

front 14

Where is a bacterial cell's DNA found?

A. Ribosomes

B. Nucleus

C. Peroxisome

D. Nucleoid region

E. Capsule

back 14

D. Nucleoid region

front 15

In a bacterium, where are proteins synthesized?

A. Ribosomes

B. Nucleus

C. Peroxisome

D. Nucleoid region

E. Capsule

back 15

A. Ribosomes

front 16

What name is given to the rigid structure, found outside the plasma membrane, that surrounds and supports the bacterial cell?

A. Capsule

B. Pili

C. Cell wall

D. Flagella

E. Nucleoid region

back 16

C. Cell wall

front 17

The _____ is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell.

A. Plasma membrane

B. Nucleoid region

C. Ribosome

D. Pili

E. Cell wall

back 17

A. Plasma membrane

front 18

The structure that regulates the passage of material into and out of this bacterial cell is indicated by the letter _____.

A. A

B. B

C. C

D. D

E. E

back 18

C. C

front 19

Categories:

Plant cell only

Animal cell only

Both

Options:

Central vacuole

Endoplasmic reticulum

Golgi apparatus

Centriole

Nucleus

Chloroplasts

Plasma membrane

Cytoskeleton

Cellulose cell wall

Mitochondria

back 19

Plant cell only:

Central vacuole

Cellulose cell wall

Chloroplasts

Animal cell only:

Centriole

Both:

Endoplasmic reticulum

Plasma membrane

Nucleus

Cytoskeleton

Golgi apparatus

Mitochondria

front 20

Categories:

Plant cell wall

Central vacuole

Chloroplast

Mitochondrion

Golgi apparatus

Options:

Produces chemical energy (ATP) that can power the cell

Makes sugar by converting light energy into chemical energy

Strong, protective structure made from cellulose fibrils

Modifies and packages proteins

Regulates cytoplasm, creates internal pressure, and stores cell compounds

back 20

Plant cell wall: Strong, protective structure made from cellulose fibrils

Central vacuole: Regulates cytoplasm, creates internal pressure, and stores cell compounds

Chloroplast: Makes sugar by converting light energy into chemical energy

Mitochondrion: Produces chemical energy (ATP) that can power the cell

Golgi apparatus: Modifies and packages proteins

front 21

Which statements are true for chloroplasts? Select the three that apply.

Their inner membrane has infoldings called cristae.

They are the sites of reactions that convert solar energy into chemical energy.

They have membranous sacs called thylakoids that are surrounded by a fluid called stroma.

Their matrix contains enzymes that function in cellular respiration.

They are the sites of reactions that convert chemical energy to ATP.

They contain the green pigment chlorophyll.

back 21

They are the sites of reactions that convert solar energy into chemical energy.

They have membranous sacs called thylakoids that are surrounded by a fluid called stroma.

They contain the green pigment chlorophyll.

front 22

Where do scientists obtain adult stem cells?

A. Pancreas

B. Skin

C. Saliva

D. Bone marrow

back 22

D. Bone marrow

front 23

Ideally, the best scaffold for growing a replacement tissue or organ would be made of what?

A. Cotton

B. Extracellular matrix

C. Plastic

D. Silicon

back 23

B. Extracellular matrix

front 24

In order to best eliminate the chance for rejection, a tissue or organ should be made from cells obtained from which of the following?

A. A sibling

B. The patient

C. A cadaver

D. A donor pig

back 24

B. The patient

front 25

If a fabricated windpipe is not receiving proper oxygen and nutrients, which of the following failed to properly regenerate?

A. White blood cells

B. Blood vessels

C. Keratin

D. Mucus producing cells

back 25

B. Blood vessels

front 26

Which of the following is most likely to receive a fabricated organ made from his own cells?

A. Lung cancer patient

B. Pancreatic cancer patient

C. Bladder cancer patient

D. Thyroid cancer patient

back 26

C. Bladder cancer patient

front 27

Organelles:

Smooth Endoplasmic Reticulum

Nucleolous

Lysosomes

Rough Endoplasmic Reticulum

Golgi Apparatus

Cytoskeleton

Mitochondria

Roles:

Generates ATP

Modefies and sorts proteins

Assembles ribosomes

Digests proteins

Produces secretory proteins

Synthesizes lipids

Defines cell shape

back 27

Smooth Endoplasmic Reticulum: Synthesizes lipids

Nucleolous: Assembles ribosomes

Lysosomes: Digests proteins

Rough Endoplasmic Reticulum: Produces secretory proteins

Golgi Apparatus: Modefies and sorts proteins

Cytoskeleton: Defines cell shape

Mitochondria: Generates ATP

front 28

Categories:

Prokaryotic only

Eukaryotic only

Both

Options:

Mitochondria

Ribosomes

Plasma membrane

Nucleoid

Lysosome

Nucleolus

Flagella

back 28

Prokaryotic only:

Nucleoid

Eukaryotic only:

Mitochondria

Nucleolus

Lysosome

Both:

Flagella

Ribosomes

Plasma membrane

front 29

1. In eukaryotic flagella, the fibers that slide past one another due to the activity of dynein proteins are ___.

2. Many cell organelles, most notably the nucleus, are anchored by ___ which are assembled from a diverse class of proteins.

3. Centrosomes are sites where protein dimers assemble into ___.

4. The extension of psuedopodia in amoeba is due to the regulated assembly and destruction of ___.

5. The only cytoskeletal fibers not associated with intracellular movement or whole cell locomotion are the ___.

6. During muscle contractions, myosin motor proteins move across tracks of ___.

Options:

Intermediate filaments

Microtubules

Microfilaments

back 29

1. In eukaryotic flagella, the fibers that slide past one another due to the activity of dynein proteins are microtubules.

2. Many cell organelles, most notably the nucleus, are anchored by intermediate filaments which are assembled from a diverse class of proteins.

3. Centrosomes are sites where protein dimers assemble into microtubules.

4. The extension of psuedopodia in amoeba is due to the regulated assembly and destruction of microfilaments.

5. The only cytoskeletal fibers not associated with intracellular movement or whole cell locomotion are the intermediate filaments.

6. During muscle contractions, myosin motor proteins move across tracks of microfilaments.

front 30

Which molecules do not normally cross the nuclear membrane?

A. DNA

B. mRNA

C. Proteins

D. Nucleotide triphosphates

back 30

A. DNA

front 31

Which of the following statements about the nuclear envelope is false?

A. The nuclear envelope is composed of two lipid bilayers.

B. Molecules pass into and out of the nucleus through nuclear pores.

C. The nuclear envelope is continuous with the Golgi apparatus.

D .Nuclear pores are made up of a group of proteins that are collectively called the nuclear pore complex.

back 31

C. The nuclear envelope is continuous with the Golgi apparatus.

front 32

True or false? Large proteins containing a nuclear localization signal (NLS) bind to the nuclear pore and enter the nucleus without any expenditure of energy.

back 32

False

front 33

A small protein (molecular weight = 25,000 daltons) is injected into a cell and observed in the nucleus a short time later. What type of transport has taken place?

A. Passive transport

B. Active transport

C. Osmosis

back 33

A. Passive transport

front 34

In experiments to test whether a protein can enter the nucleus, why would proteins be labeled with fluorescent molecules?

A. To make the proteins easy to see

B. To give the protein molecules energy

C. To make the proteins bigger

D. To target the proteins to the nucleus

back 34

A. To make the proteins easy to see

front 35

Nucleoplasmin is a nuclear protein. This protein was divided into two segments and linked to the same large cytoplasmic protein, generating two fusion proteins. After injecting these fusion proteins into a cell, one of the proteins was found in the nucleus and the other in the cytoplasm. Which of the following conclusions can be drawn from these results?

A. One of the fusion proteins entered the nucleus by passive transport.

B. The cytoplasmic protein contains a nuclear localization signal.

C. Nucleoplasmin does not have a nuclear localization signal.

D. Only one of the two fusion proteins possesses a nuclear localization signal.

back 35

D. Only one of the two fusion proteins possesses a nuclear localization signal.

front 36

Which of these cell junctions form a barrier to the passage of materials?

A. Desmosomes (anchoring junctions)

B. Tight junctions

C. Keratin fibers

D. Gap (communicating) junctions

E. Plasmodesmata

back 36

B. Tight junctions

front 37

The primary role of _____ is to bind animal cells together.

A. The cytoskeleton

B. Plasmodesmata

C. Gap (communicating) junctions

D. Desmosomes

E. Tight junctions

back 37

D. Desmosomes

front 38

_____ aid in the coordination of the activities of adjacent animal cells.

A. Desmosomes

B. Plasmodesmata

C. Tight junctions

D. Gap (communicating) junctions

E. Keratin fibers

back 38

D. Gap (communicating) junctions