BIO 1.1.1

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596480

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Which of the following statements is true about a plasma membrane?

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Explanation

The plasma membrane is made up of a bilayer of phospholipids, which prevent fluids from leaking out of the cell.

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Which of the following describes simple diffusion?

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Explanation

Simple diffusion involves particles moving from an area of high concentration to an area of lower concentration without the use of energy or helper membrane proteins.

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The inner region of a plasma membrane's phospholipid bilayer:

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Explanation

The tail portions of each individual molecule are hydrophobic and, therefore, repel water from the inner region of the phospholipid bilayer.

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Cilia:

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Explanation

Cilia are short, microtubule-based projections often found in large numbers on a single cell. Their sweeping movement can help move the cell and also move fluid along and past a cell.

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Which of the following is found in both prokaryotic and eukaryotic cells?

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Explanation

Ribosomes are present in all living cells.

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A drug that alters membrane function and serves to reduce anxiety is called:

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Explanation

By binding to beta-adrenergic receptors (or beta-receptors) and thereby blocking adrenaline from binding, beta-blocker drugs reduce anxiety.

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Cystic fibrosis is the result of what type of faulty plasma membrane molecule?

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Explanation

Transport proteins move molecules into the cell that are not able to diffuse through the membrane. Cystic fibrosis occurs when an individual inherits incorrect genetic instructions for producing a transport protein that controls the flow of chloride ions into and out of cells found primarily in the lungs and digestive tract.

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Modern airplanes are built with waterproof seals around the windows and rivets are used to hold the metal sheets to the frame, forming the fuselage. The waterproof seals are to rivets as are to __ .

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Explanation

Tight junctions form waterproof seals, and desmosomes function like rivets.

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Which of the following would be performed by a transport protein in the cell membrane?

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Explanation

Transport proteins provide a passageway for molecules through the cell. A transport protein would allow a molecule of testosterone produced in a testicular cell to move out of the cell and into the bloodstream.

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Which of the following types of cell would you expect to have the fewest mitochondria?

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Explanation

Fat cells have very low metabolic activity and thus a low number of mitochondria.

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Which of the following cell connections is INCORRECTLY matched with its location in living organisms?

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Which of the following statements about cellular "fingerprints" is false?

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Explanation

All of these statements about cellular fingerprints are actually true. Every cell has a fingerprint made from molecules on its outer surface, and this fingerprint is key to helping the immune system distinguish "self" from "non-self."

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Which of the following statements is true?

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Explanation

Cell division in plants occurs without the centriole. Plant cells are able to make their own food with the presence of chloroplasts. Their cells also can store water and dissolved substances in their large central vacuoles.

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The smallest unit of life that can function independently and perform all the necessary functions of life, including reproducing itself.

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In Tay-Sachs disease, a genetic mutation causes a malfunction in a certain organelle that leads to a backup of molecules and proteins, ultimately interfering with the entire functioning of the cell. Which organelle is primarily affected by this disease?

BIO 1.1.1

Question 1 of 1

Time Left

Which of the following statements is true about a plasma membrane?

Select the correct answer(s).

(0/0)

Explanation

Which of the following describes simple diffusion?

Select the correct answer(s).

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Explanation

The inner region of a plasma membrane's phospholipid bilayer:

Select the correct answer(s).

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Explanation

Cilia:

Select the correct answer(s).

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Explanation

Which of the following is found in both prokaryotic and eukaryotic cells?

Select the correct answer(s).

(0/0)

Explanation

A drug that alters membrane function and serves to reduce anxiety is called:

Select the correct answer(s).

(0/0)

Explanation

Cystic fibrosis is the result of what type of faulty plasma membrane molecule?

Select the correct answer(s).

(0/0)

Explanation

Modern airplanes are built with waterproof seals around the windows and rivets are used to hold the metal sheets to the frame, forming the fuselage. The waterproof seals are to rivets as ________ are to __________ .

Select the correct answer(s).

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Explanation

Which of the following would be performed by a transport protein in the cell membrane?

Select the correct answer(s).

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Explanation

Which of the following types of cell would you expect to have the fewest mitochondria?

Select the correct answer(s).

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Explanation

Which of the following cell connections is INCORRECTLY matched with its location in living organisms?

Select the correct answer(s).

(0/0)

Which of the following statements about cellular "fingerprints" is false?

Select the correct answer(s).

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Explanation

Which of the following statements is true?

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Explanation

The smallest unit of life that can function independently and perform all the necessary functions of life, including reproducing itself.

Fill in the blanks

(0/0)

In Tay-Sachs disease, a genetic mutation causes a malfunction in a certain organelle that leads to a backup of molecules and proteins, ultimately interfering with the entire functioning of the cell. Which organelle is primarily affected by this disease?

Select the correct answer(s).

(0/0)

Explanation

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Modern airplanes are built with waterproof seals around the windows and rivets are used to hold the metal sheets to the frame, forming the fuselage. The waterproof seals are to rivets as are to __ .