Beginning within the nucleus, the first action resulting in the synthesis of a polypeptide is _____.

You are watching: The extension of pseudopodia in amoeba is due to the regulated assembly and destruction of

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


Pancreatic cells, which secrete a big amount of digestive enzymes, are labeled with radioactive leucine and also then chased for numerous hrs via nonradioactive leucine. Photographic emulsions are all set at different times during the chase. Where would certainly the black spots show up on an emulsion prepared 3 hours after the pulse?

A. Golgi apparatus

B. Secretory vesicles

C. Exterior of the cell

D. Rough ER


What path does a protein in the secretory pathmeans take, beginning 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, turbulent ER, secretory vesicles, plasma membrane


Throughout a pulse-chase experiment, photographic emulsions were all set at various times throughout the chase, and also radioenergetic spots were detected at the following times and also 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 last 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 with the Golgi apparatus.


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


8

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

A. Movement of molecules via 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


A. Movement of molecules with a cell over time


9

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

True or False


False


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 through an unlabeled molecule

D. Incubating cells with a labeled molecule


D. Incubating cells with a labeled molecule


11

_____ are surconfront appendages that permit a bacterium to stick to a surchallenge.

A. Flagella

B. Ribosomes

C. Cell walls

D. Fimbriae

E. Mitochondria


D. Fimbriae


12

What is the feature of a bacterium"s capsule?

A. Protein synthesis

B. Adhesion

C. DNA storage

D. Protection

E. Propulsion


D. Protection


13
*

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

A. A

B. B

C. C

E. E


D. D


14

Wright here is a bacterial cell"s DNA found?

A. Ribosomes

B. Nucleus

C. Peroxisome

D. Nucleoid region

E. Capsule


D. Nucleoid region


15

In a bacterium, where are proteins synthesized?

A. Ribosomes

B. Nucleus

C. Peroxisome

D. Nucleoid region

E. Capsule


A. Ribosomes


16

What name is offered to the rigid structure, found exterior the plasma membrane, that surrounds and also supports the bacterial cell?

A. Capsule

B. Pili

C. Cell wall

D. Flagella

E. Nucleoid region


C. Cell wall


17

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

A. Plasma membrane

B. Nucleoid region

C. Ribosome

D. Pili

E. Cell wall


A. Plasma membrane


18
*

The structure that regulates the passage of product right into and out of this bacterial cell is suggested by the letter _____.

A. A

B. B

C. C

D. D

E. E


C. C


19

Categories:

Plant cell only

Animal cell only

Both

Options:

Central vacuole

Endoplasmic reticulum

Golgi apparatus

Centriole

Nucleus

Chloroplasts

Plasma membrane

Cytoskeleton

Cellushed cell wall

Mitochondria


Plant cell only:

Central vacuole

Cellushed cell wall

Chloroplasts

Animal cell only:

Centriole

Both:

Endoplasmic reticulum

Plasma membrane

Nucleus

Cytoskeleton

Golgi apparatus

Mitochondria


20
*

Categories:

Plant cell wall

Central vacuole

Chloroplast

Mitochondrion

Golgi apparatus

Options:

Produces chemical energy (ATP) that have the right to power the cell

Makes sugar by converting light energy right into chemical energy

Strong, protective structure made from cellulose fibrils

Modifies and also packeras proteins

Regulates cytoplasm, creates interior press, and also stores cell compounds


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

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

Chloroplast: Makes sugar by converting light energy into chemical energy

Mitochondrion: Produces chemical power (ATP) that have the right to power the cell

Golgi apparatus: Modifies and packperiods proteins


21
*

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

Their inner membrane has actually infoldings called cristae.

They are the sites of reactions that transform solar power into chemical power.

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

Their matrix has enzymes that feature in cellular respiration.

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

They contain the green pigment chlorophyll.


They are the sites of reactions that transform solar energy right into chemical power.

They have membranous sacs called thylakoids that are surrounded by a liquid referred to as stroma.

They contain the green pigment chlorophyll.


22

Where do scientists acquire adult stem cells?

A. Pancreas

B. Skin

C. Saliva

D. Bone marrow


D. Bone marrow


23

Ideally, the finest scaffold for flourishing a replacement tworry or body organ would be made of what?

A. Cotton

B. Extracellular matrix

C. Plastic

D. Silicon


B. Extracellular matrix


24

In order to best get rid of the opportunity for rejection, a tworry or body organ should be made from cells derived from which of the following?

A. A sibling

B. The patient

C. A cadaver

D. A donor pig


B. The patient


25

If a fabricated windpipe is not receiving appropriate oxygen and nutrients, which of the adhering to fairesulted in properly regenerate?

A. White blood cells

B. Blood vessels

C. Keratin

D. Mucus creating cells


B. Blood vessels


26

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

A. Lung cancer patient

B. Pancreatic cancer patient

C. Bladder cancer patient

D. Thyroid cancer patient


C. Bladder cancer patient


27

Organelles:

Smooth Endoplasmic Reticulum

Nucleolous

Lysosomes

Rough Endoplasmic Reticulum

Golgi Apparatus

Cytoskeleton

Mitochondria

Roles:

Geneprices ATP

Modefies and also sorts proteins

Assembles ribosomes

Digests proteins

Produces secretory proteins

Synthesizes lipids

Defines cell shape


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


28

Categories:

Prokaryotic only

Eukaryotic only

Both

Options:

Mitochondria

Ribosomes

Plasma membrane

Nucleoid

Lysosome

Nucleolus

Flagella


Prokaryotic only:

Nucleoid

Eukaryotic only:

Mitochondria

Nucleolus

Lysosome

Both:

Flagella

Ribosomes

Plasma membrane


29

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

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

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

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

5. The only cytoskeletal fibers not connected through intracellular activity or whole cell locomotion are the ___.

6. Throughout muscle contractions, myosin motor proteins relocate throughout tracks of ___.

Options:

Intermediate filaments

Microtubules

Microfilaments


1. In eukaryotic flagella, the fibers that slide previous one another as a result of the activity of dynein proteins are microtubules.

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

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

4. The expansion of psuedopodia in amoeba is due to the regulated assembly and also devastation of microfilaments.

5. The just cytoskeletal fibers not connected via intracellular movement or totality cell locomovement are the intermediate filaments.

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


30

Which molecules carry out not usually cross the nuclear membrane?

A. DNA

B. mRNA

C. Proteins

D. Nucleotide triphosphates


A. DNA


31

Which of the adhering to statements around the nuclear envelope is false?

A. The nuclear envelope is written of 2 lipid bilayers.

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

C. The nuclear envelope is constant via the Golgi apparatus.

D .Nuclear pores are consisted of of a team of proteins that are collectively called the nuclear pore complex.


C. The nuclear envelope is constant through the Golgi apparatus.


32

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


False


33

A little protein (molecular weight = 25,000 daltons) is injected into a cell and oboffered in the nucleus a brief time later on. What form of carry has actually taken place?

A. Passive transport

B. Active transport

C. Osmosis


A. Passive transport


34

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

A. To make the proteins straightforward to see

B. To offer the protein molecules energy

C. To make the proteins bigger

D. To taracquire the proteins to the nucleus


A. To make the proteins simple to see


35

Nucleoplasmin is a nuclear protein. This protein was divided right into 2 segments and also attached to the exact same big 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 deserve to be drawn from these results?

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

B. The cytoplasmic protein has a nuclear localization signal.

C. Nucleoplasmin does not have actually a nuclear localization signal.

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