Cells Review

Below is a diagram of a cell. What organelle is "C" pointing to?

• Cytoplasm

• Vacuole

• Nucleus

• Mitochondria

Answer explanation

Organelle 'C' is pointing to the nucleus, which contains the cell's genetic material and controls its activities. The other options, such as cytoplasm, vacuole, and mitochondria, serve different functions within the cell.

Tags

NGSS.MS-LS1-2

What is the gel-like fluid that fills the inside of a cell?

• Nucleus

• Vacuole

• Cytoplasm

• Cell membrane

Answer explanation

The gel-like fluid that fills the inside of a cell is called cytoplasm. It surrounds the organelles and is essential for cellular processes, distinguishing it from the nucleus, vacuole, and cell membrane.

Tags

NGSS.MS-LS1-2

Which statement BEST describes all living things?

• They must reproduce sexually

• They are composed of one or more cells

• They are capable of making their own food

• They have organ systems to carry out the process of life.

Answer explanation

The statement "They are composed of one or more cells" best describes all living things, as all organisms, whether unicellular or multicellular, share this fundamental characteristic.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-3

Which statement is NOT part of the cell theory?

• All living things are made of cells

• Cells are the basic unit of life

• All cells contain the same organelles

• All new cells come from preexisting cells

Answer explanation

The statement "All cells contain the same organelles" is NOT part of the cell theory because cells can have different organelles depending on their type and function, unlike the other statements which are fundamental to cell theory.

Tags

NGSS.MS-LS1-1

Below is a diagram of a cell. What organelle does "D" point to?

• Cell Membrane

• Mitochondira

• Chloroplast

• Nucleus

Answer explanation

Organelle "D" points to the chloroplast, which is responsible for photosynthesis in plant cells, converting sunlight into energy. The other options, like mitochondria and nucleus, serve different functions.

Tags

NGSS.MS-LS1-2

Which type of cell contains a cell wall, chloroplasts, and has a rectangular shape?

• Viral cell

• Plant cell

• Animal cell

• Bacteria cell

Answer explanation

A plant cell contains a cell wall and chloroplasts, which are essential for photosynthesis. Its rectangular shape is due to the rigid cell wall, distinguishing it from animal and bacterial cells.

Many plant cells have a large ​ (a)   that is filled with fluid.

• Vacuole

• Nucleus

• Mitochondria

• Chloroplasts

Answer explanation

The correct answer is 'Vacuole' because many plant cells contain a large vacuole filled with fluid, which helps maintain turgor pressure and store nutrients. The other options do not serve this specific function.

Tags

NGSS.MS-LS1-2

The site of photosynthesis in a plant cell is the

• Cytoplasm

• Chloroplast

• Mitochondria

• Cell wall

Answer explanation

The chloroplast is the organelle in plant cells where photosynthesis occurs, converting light energy into chemical energy. Other options like cytoplasm, mitochondria, and cell wall do not perform this function.

Tags

NGSS.MS-LS1-6

Rob’s cells can’t convert food effectively into energy that they can use. As a result, he gets extremely tired and has weak legs. Which organelle is affected by Rob’s disease?

• Nucleus

• Mitochondria

• Cell wall

• Chloroplast

Answer explanation

Rob's inability to convert food into energy indicates a problem with energy production. Mitochondria are the organelles responsible for generating energy in cells, making them the affected organelle in Rob's disease.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-7

Sandra has a disease. Her body is unable to control the flow of substances into and out of her cells. Which organelle is affected by Sandra’s disease?

• Chloroplasts

• Cell wall

• Cytoplasm

• Cell membrane

Answer explanation

Sandra's disease affects the cell membrane, which regulates the flow of substances into and out of cells. A malfunction here disrupts this critical function, leading to her symptoms.

Tags

NGSS.MS-LS1-2