Question 1

A solid waste (garbage) transfer facility that sorts and breaks down garbage into recyclables and waste to be thrown away in the landfill would be a suitable analogy for which cellular organelle?

Accepted Answer

A)  smooth ER
B)  rough ER
C)  lysosome
D)  nucleus

Question 2

The smallest and most basic units of life are microscopic,self-contained units enclosed by a water repelling membrane and are called ________.

Accepted Answer

The answer of The smallest and most basic units of...

Question 3

You buy a bunch of small,round,red radishes at the grocery store;they are on sale because they have been sitting in the produce aisle for a while.When you get home you remove the stems and clean them.With the first bite,you notice their texture is not as crisp and crunchy as you like.Your friend says you should refrigerate them in a bowl of water overnight.The next day the radishes are crisp and crunchy again.What is the most likely explanation of why they became crunchy again after soaking in water?

Accepted Answer

A)  The radish cells were hypertonic to the water in which they were soaking.So,the water moved by osmosis across the plasma membranes into the radish cells increasing the turgor pressure inside of the cells and making them crunchier.
B)  The radish cells were hypotonic to the water in which they were soaking.So,the water osmosed across the plasma membranes out of the radish cells decreasing the turgor pressure inside of the cells and making them crunchier.
C)  The radish cells were hypertonic to the water in which they were soaking.So,the water osmosed across the plasma membranes into the radish cells decreasing the turgor pressure inside of the cells.
D)  The radish cells were hypotonic to the water in which they were soaking.So,the water osmosed across the plasma membranes into the radish cells decreasing the turgor pressure inside of the cells.

Question 4

A screen door allows breezes to enter and aromas to exit but keeps out insects.Its function most resembles

Accepted Answer

A)  the cytosol.
B)  the plasma membrane.
C)  the ER lumen.
D)  a ribosome.

Question 5

Match the following cellular structures with their primary function (you may need to use a function more than once) .
-central vacuole

Accepted Answer

A)  photosynthesis
B)  regulate what moves in and out of cell
C)  structure and support for cell
D)  lipid synthesis
E)  tags proteins for movementF) enzymatic breakdown of large moleculesG) protein synthesisH) cellular respirationI) water and solute storageJ) location of DNAK) internal organization and structural support

Question 6

The plasma membrane of some white blood cells contain ________ that bind with proteins of cells such as bacteria that have invaded the human body.These special proteins tell the white blood cells those bacterial cells do not belong to that particular human and to phagocytize (eat) them.

Accepted Answer

A)  channel proteins
B)  receptor proteins
C)  diffusion proteins
D)  carrier proteins

Question 7

Many important cellular functions in eukaryotic cells occur within membrane-enclosed organelles,such as cellular respiration occurring within the mitochondria.The membranes of the mitochondria provide a place for enzymes needed for cellular respiration to anchor and function.Prokaryotic cells must also carry out respiration but do not have mitochondria.Where is the most likely place that enzymes needed for cellular respiration are anchored and functioning?

Accepted Answer

A)  the cell wall
B)  the chromosome
C)  the cytosol
D)  the plasma membrane

Question 8

The endoplasmic reticulum (ER) is a single membrane continuous with the nuclear envelope and a series of interconnected sacs throughout the cell.Why might it be beneficial to the cell for the ER to be continuous with the nuclear envelope?

Accepted Answer

A)  It might be beneficial because it takes less energy,DNA,carbohydrates,and phosophlipids for the ER to synthesize centrioles.
B)  It might be beneficial for the ER and nuclear envelope to be connected because it might make it easier for messages to get from the nucleus to the ER where proteins and lipids are made for the cell;this would most likely require the use of less energy.
C)  It might be beneficial for the ER and nuclear envelope to be connected because it would make it easier for the nucleus to actually carry out cellular respiration.
D)  It might be beneficial for the ER and nuclear envelope to be connected because it would make it easier for the ER to carry out photosynthesis.

Question 9

A protein molecule,transferrin,embedded in the plasma membrane recognizes iron molecules and causes the plasma membrane to fold in around the iron and take it into the cell.This is an example of

Accepted Answer

A)  osmosis.
B)  diffusion.
C)  receptor-mediated endocytosis.
D)  pinocytosis.

Question 10

You are a microbiologist working with a species of bacteria that can perform photosynthesis.You know that the enzymes needed to perform photosynthesis in plant cells are closely associated with the membranes in chloroplasts.Where in the bacteria would you expect to find the enzymes needed to perform photosynthesis?

Accepted Answer

A)  I would expect to find the photosynthetic enzymes in the chloroplasts of the bacteria.
B)  I would expect to find the photosynthetic enzymes associated with the plasma membrane of the bacteria.
C)  I would expect to find the photosynthetic enzymes associated with the mitochondria of the bacteria.
D)  I would expect to find the photosynthetic enzymes associated with the ER of the bacteria.

Question 11

Prokaryotes and eukaryotes are primarily distinguished by the absence or presence of internal membrane-enclosed organelles.Are prokaryotic cells at an evolutionary disadvantage because they lack organelles?

Accepted Answer

A)  Yes;without organelles,prokaryotic cells cannot photosynthesize or respire.
B)  Yes;without organelles,prokaryotes are unable to bring together the reactants needed for biological reactions.
C)  No;although prokaryotic cells are comparatively less efficient than eukaryotic cells,they are still able to carry out the processes necessary for survival and reproduction.
D)  No;eukaryotic organelles are expelled each time the cell divides.

Question 12

Match the following cellular structures with their primary function (you may need to use a function more than once) .
-lysosome

Accepted Answer

A)  photosynthesis
B)  regulate what moves in and out of cell
C)  structure and support for cell
D)  lipid synthesis
E)  tags proteins for movementF) enzymatic breakdown of large moleculesG) protein synthesisH) cellular respirationI) water and solute storageJ) location of DNAK) internal organization and structural support

Exam 3: Life Is Cellular

The endoplasmic reticulum (ER) is a single membrane continuous with the nuclear envelope and a series of interconnected sacs throughout the cell.Why might it be beneficial to the cell for the ER to be continuous with the nuclear envelope?

Correct Answer
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Match the following cellular structures with their primary function (you may need to use a function more than once) . -lysosome

Correct Answer
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Correct Answer
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Correct Answer
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A protein molecule,transferrin,embedded in the plasma membrane recognizes iron molecules and causes the plasma membrane to fold in around the iron and take it into the cell.This is an example of

Correct Answer
verified

A screen door allows breezes to enter and aromas to exit but keeps out insects.Its function most resembles

Correct Answer
verified

A solid waste (garbage) transfer facility that sorts and breaks down garbage into recyclables and waste to be thrown away in the landfill would be a suitable analogy for which cellular organelle?

Correct Answer
verified

Correct Answer
verified

Match the following cellular structures with their primary function (you may need to use a function more than once) . -central vacuole

Correct Answer
verified

The plasma membrane of some white blood cells contain ________ that bind with proteins of cells such as bacteria that have invaded the human body.These special proteins tell the white blood cells those bacterial cells do not belong to that particular human and to phagocytize (eat) them.

Correct Answer
verified

Prokaryotes and eukaryotes are primarily distinguished by the absence or presence of internal membrane-enclosed organelles.Are prokaryotic cells at an evolutionary disadvantage because they lack organelles?

Correct Answer
verified

The smallest and most basic units of life are microscopic,self-contained units enclosed by a water repelling membrane and are called ________.

Correct Answer
verified

Exam 3: Life Is Cellular

The endoplasmic reticulum (ER) is a single membrane continuous with the nuclear envelope and a series of interconnected sacs throughout the cell.Why might it be beneficial to the cell for the ER to be continuous with the nuclear envelope?

Correct AnswerverifiedShow Answer

Match the following cellular structures with their primary function (you may need to use a function more than once) . -lysosome

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A protein molecule,transferrin,embedded in the plasma membrane recognizes iron molecules and causes the plasma membrane to fold in around the iron and take it into the cell.This is an example of

Correct AnswerverifiedShow Answer

A screen door allows breezes to enter and aromas to exit but keeps out insects.Its function most resembles

Correct AnswerverifiedShow Answer

A solid waste (garbage) transfer facility that sorts and breaks down garbage into recyclables and waste to be thrown away in the landfill would be a suitable analogy for which cellular organelle?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Match the following cellular structures with their primary function (you may need to use a function more than once) . -central vacuole

Correct AnswerverifiedShow Answer

The plasma membrane of some white blood cells contain ________ that bind with proteins of cells such as bacteria that have invaded the human body.These special proteins tell the white blood cells those bacterial cells do not belong to that particular human and to phagocytize (eat) them.

Correct AnswerverifiedShow Answer

Prokaryotes and eukaryotes are primarily distinguished by the absence or presence of internal membrane-enclosed organelles.Are prokaryotic cells at an evolutionary disadvantage because they lack organelles?

Correct AnswerverifiedShow Answer

The smallest and most basic units of life are microscopic,self-contained units enclosed by a water repelling membrane and are called ________.

Correct AnswerverifiedShow Answer

Correct Answer
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