Science 7 - 2nd Qtr (Review)

Identify the part of cell where the arrow is pointing at:

• centriole

• vacuole

• lysosome

• endoplasmic reticulum

Answer explanation

The lysosome is the part of the cell responsible for breaking down waste materials and cellular debris. It contains enzymes that digest these substances, making it the correct answer for the part indicated by the arrow.

Identify the part of cell where the arrow is pointing at:

• cell wall

• cytoskeleton

• nucleus

• cell membrane

Answer explanation

The cell membrane is the outermost layer of the cell, responsible for regulating what enters and exits. It is distinct from the cell wall, which is found in plant cells, and is not the nucleus or cytoskeleton.

Identify the part of cell where the arrow is pointing at:

• vacuole

• lysosome

• endoplasmic reticulum

• ribosome

Answer explanation

The vacuole is a membrane-bound organelle that stores substances and maintains turgor pressure in plant cells. It is often large and central, making it easily identifiable, unlike lysosomes, endoplasmic reticulum, or ribosomes.

Identify the part of cell where the arrow is pointing at:

• lysosome

• centrioles

• endoplasmic reticulum

• Golgi apparatus

Answer explanation

The arrow points to the centrioles, which are cylindrical structures involved in cell division. They play a crucial role in organizing microtubules and are distinct from lysosomes, endoplasmic reticulum, and Golgi apparatus.

Identify the part of cell where the arrow is pointing at:

• cell membrane

• cell wall

• cytoplasm

• nucleoplasm

Answer explanation

The cytoplasm is the gel-like substance within the cell membrane, where various organelles are suspended. It is distinct from the cell membrane, cell wall, and nucleoplasm, making it the correct answer.

Identify the part of cell where the arrow is pointing at:

• endoplasmic reticulum

• Golgi apparatus

• cell membrane

• mitochondrion

Answer explanation

The endoplasmic reticulum (ER) is a network of membranes involved in protein and lipid synthesis. It is often depicted as a series of folded membranes, distinguishing it from the Golgi apparatus, cell membrane, and mitochondrion.

Identify the part of cell where the arrow is pointing at:

• vacuole

• lysosome

• Golgi complex

• centrioles

Answer explanation

The Golgi complex is responsible for modifying, sorting, and packaging proteins and lipids for secretion or delivery to other organelles. It is often depicted as a series of stacked membranes, distinguishing it from vacuoles, lysosomes, and centrioles.

Identify the part of cell where the arrow is pointing at:

• mitochondrion

• vacuole

• lysosome

• nucleus

Answer explanation

The mitochondrion is the powerhouse of the cell, responsible for producing energy. It is often depicted as a double-membraned organelle, which distinguishes it from vacuoles, lysosomes, and the nucleus.

Identify the part of cell where the arrow is pointing at:

• endoplasmic reticulum

• nucleolus

• vacuole

• lysosome

Answer explanation

The nucleolus is a prominent structure within the nucleus, responsible for ribosome production. The other options, such as endoplasmic reticulum, vacuole, and lysosome, are distinct cellular components not indicated by the arrow.

Identify the part of cell where the arrow is pointing at:

• centrioles

• Golgi bodies

• vacuole

• nucleus

Answer explanation

The nucleus is the control center of the cell, containing genetic material. It is distinct from centrioles, Golgi bodies, and vacuoles, which have different functions. Therefore, the arrow points to the nucleus.