Cell Biology Quiz: BWHS

What is the plasma membrane also known as?

• Cell wall

• Cytoplasm

• Cell membrane

• Ribosome

Answer explanation

The plasma membrane is also known as the cell membrane. It serves as a barrier that separates the interior of the cell from the external environment, unlike the cell wall, which is found in plant cells.

Where are ribosomes located?

• Inside the nucleus

• In the cytoplasm

• On the plasma membrane

• Outside the cell

Answer explanation

Ribosomes are primarily located in the cytoplasm, where they synthesize proteins. They can also be found on the rough endoplasmic reticulum, but they are not located inside the nucleus, on the plasma membrane, or outside the cell.

What is the nucleus surrounded by?

• Cytoplasm

• Nuclear membrane

• Ribosomes

• Plasma membrane

Answer explanation

The nucleus is surrounded by the nuclear membrane, which acts as a barrier, separating the contents of the nucleus from the cytoplasm. This membrane is essential for regulating what enters and exits the nucleus.

What is the significance of the plasma membrane's lipid composition?

• It provides energy

• It forms a barrier

• It stores genetic information

• It produces proteins

Answer explanation

The lipid composition of the plasma membrane is crucial as it forms a barrier that separates the cell from its environment, maintaining homeostasis and regulating the movement of substances in and out of the cell.

What is the main difference between prokaryotic and eukaryotic cells?

• Presence of a cell wall

• Presence of a nucleus

• Presence of ribosomes

• Presence of cytoplasm

Answer explanation

The main difference between prokaryotic and eukaryotic cells is the presence of a nucleus. Eukaryotic cells have a defined nucleus that houses their DNA, while prokaryotic cells do not have a nucleus.

Which of the following is an example of an organism with eukaryotic cells?

• Bacteria.

• Fungi.

• Archaea.

• Viruses.

Answer explanation

Fungi are eukaryotic organisms, meaning their cells have a nucleus and organelles. In contrast, bacteria and archaea are prokaryotic, and viruses are not classified as living organisms.

Tags

NGSS.MS-LS1-1

What is the primary difference between prokaryotic and eukaryotic cells?

• Presence of a cell wall.

• Presence of a nucleus.

• Size of the cell.

• Type of DNA.

Answer explanation

The primary difference between prokaryotic and eukaryotic cells is the presence of a nucleus. Prokaryotic cells lack a true nucleus, while eukaryotic cells have a defined nucleus that houses their DNA.

Which organelle provides energy to the cell?

• Nucleus

• Ribosome

• Mitochondria

• Lysosome

Answer explanation

The mitochondria are known as the powerhouse of the cell because they generate ATP, the main energy currency of the cell, through cellular respiration. Other organelles have different functions, but mitochondria specifically provide energy.

Tags

NGSS.HS-LS1-7

Which structure is responsible for housing the cell's genetic material?

• Mitochondria

• Ribosome

• Nucleus

• Golgi apparatus

Answer explanation

The nucleus is the structure that houses the cell's genetic material, including DNA. It controls cellular activities and is essential for reproduction and growth, unlike mitochondria, ribosomes, or the Golgi apparatus.

What is the function of the centrosome?

• Energy production

• Protein synthesis

• Organizing microtubules

• DNA replication

Answer explanation

The centrosome is crucial for organizing microtubules, which are essential for cell structure and division. It acts as a microtubule-organizing center, making 'Organizing microtubules' the correct function.

Tags

NGSS.HS-LS1-4