TASC Biology Level 3 Practice Questions - TASC Biology Level 3 (Course Code BIO315124) Exam - TASC Biology Level 3 Practice Questions - TASC Biology Level 3 (Course Code BIO315124) Exam

Question 1

Which of the following cellular structures is present in eukaryotic plant cells but absent in human somatic cells?

Cell wall composed of cellulose Mitochondria with folded cristae Endoplasmic reticulum with ribosomes Phospholipid bilayer plasma membrane

Correct Answer:

Cell wall composed of cellulose

Question 2

According to the fluid mosaic model, what primary component forms the structural matrix of the cell membrane, creating a selective barrier to water-soluble molecules?

Phospholipid bilayer with hydrophobic tails oriented inward Glycoprotein network spanning the peripheral membrane surface Cholesterol polymer meshwork embedded within cytosolic fluid Transmembrane ion channels formed exclusively by amino acids

Correct Answer:

Phospholipid bilayer with hydrophobic tails oriented inward

Question 3

How does simple diffusion differ from facilitated diffusion across a biological membrane?

Simple diffusion moves small nonpolar molecules directly through the lipid bilayer without transport proteins. Simple diffusion requires ATP hydrolysis, whereas facilitated diffusion relies on kinetic energy. Facilitated diffusion transports solutes against their concentration gradient using protein pumps. Simple diffusion only occurs in prokaryotic cells, whereas facilitated diffusion occurs only in eukaryotic cells.

Correct Answer:

Simple diffusion moves small nonpolar molecules directly through the lipid bilayer without transport proteins.

Question 4

When a plant cell is placed in a hypertonic extracellular solution, what observed cellular response occurs?

Water exits the cell by osmosis, causing the central vacuole to shrink and the plasma membrane to pull away from the cell wall (plasmolysis). Water enters the cell rapidly by osmosis, causing the cell membrane to rupture (cytolysis). Solutes are actively pumped out of the cell until the intracellular fluid becomes hypertonic. The cell wall expands to absorb excess water, increasing cell turgor pressure.

Correct Answer:

Water exits the cell by osmosis, causing the central vacuole to shrink and the plasma membrane to pull away from the cell wall (plasmolysis).

Question 5

Which statement accurately describes the active transport mechanism executed by the sodium-potassium pump (Na+/K+ ATPase)?

It hydrolyzes one ATP molecule to pump 3 Na+ ions out of the cell and 2 K+ ions into the cell against their respective concentration gradients. It uses passive channel proteins to allow 3 Na+ ions to diffuse into the cell for every 2 K+ ions diffusing out. It transports 2 Na+ ions into the cell and 3 K+ ions out of the cell without expending cellular metabolic energy. It actively transports Na+ and K+ ions in equal numbers out of the cell to establish an isotonic cytosolic state.

Correct Answer:

It hydrolyzes one ATP molecule to pump 3 Na+ ions out of the cell and 2 K+ ions into the cell against their respective concentration gradients.

Question 1

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Prepare with the TASC Biology Level 3 Practice Questions - TASC Biology Level 3 (Course Code BIO315124) Exam practice quiz. This question bank includes 100 questions covering cellular, plant, cells, human, and reaction. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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TASC Biology Level 3 Practice Questions - TASC Biology Level 3 (Course Code BIO315124) Exam

This practice set contains 100 questions from the matching question bank and focuses on cellular, plant, cells, human, and reaction. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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TASC Biology Level 3 Practice Questions - TASC Biology Level 3 (Course Code BIO315124) Exam

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