AP Biology- Subcellular Parts/Organelles CW

Studies of the endomembrane system often involve the use of a protein that can emit a green fluorescence (glow). A researcher wants to make a video of cell behavior, so she initially labels the outer nuclear envelope of a cell with the fluorescent tag and records a video for several hours. Later, she sees that the tag is part of a transport vesicle very close to the plasma membrane. What likely happened during the intervening time?

• The outer membrane of the nucleus broke off and moved the fluorescent tag to the Golgi.

• The endoplasmic reticulum engulfed the tagged protein and released it in a transport vacuole

• Material from the nucleus, including the tag, was being secreted outside the cell.

• The tag was seen in the Golgi before being seen in a transport vacuole.

Studies of the endomembrane system often involve the use of a protein that can emit a green fluorescence (glow). A researcher wants to make a video of cell behavior, so she initially labels the outer nuclear envelope of a cell with the fluorescent tag and records a video for several hours. Later, she sees that the tag is part of a transport vesicle very close to the plasma membrane. The fluorescent tag likely did not become incorporated into which of the following organelles?

• "receiving" side of Golgi

• "shipping" side of Golgi

• mitochondria

• rough ER

Which part of the mitochondrion shown enhances its ability to produce ATP by increasing the surface area of a mitochondrial membrane?

• structure A

• structure B

• structure C

• structure D

GPCRs are receptor proteins found in the plasma membrane that are important for cellular communication. What cellular structure makes GPCRs?

• the smooth endoplasmic reticulum

• the rough endoplasmic reticulum

• Golgi apparatus

• mitochondria

Hexokinase is an enzyme that is involved with glycolysis (the breakdown of glucose for energy release) that occurs in the cytoplasm. What cellular structure makes hexokinase?

• the smooth endoplasmic reticulum

• the rough endoplasmic reticulum

• free ribosomes

• mitochondria

A child dies following a series of chronic bacterial infections. At the autopsy, the physicians are startled to see that the child's white blood cells are loaded with vacuoles containing intact bacteria. Which of the following explanations could account for this finding?

• A defect in the Golgi apparatus prevented the cells from processing and excreting the bacteria.

• A defect in the rough endoplasmic reticulum prevented the synthesis of the antibodies (defensive proteins) that would have inactivated the bacteria.

• A defect in the cell walls of the white blood cells permitted bacteria to enter the cells.

• A defect in the lysosomes of the white blood cells prevented the cells from destroying engulfed bacteria.

Which of the following statements regarding cells is false?

• All cells are enclosed in a membrane that maintains internal conditions different from the surroundings.

• All cells have a cell wall.

• All cells have cytoplasm.

• All cells have DNA as their genetic material.

The endosymbiosis hypothesis proposes that

• two separate cells worked cooperatively and one benefited from the other

• a small cell lived inside a larger cell to the benefit of both cells.

• a large cell engulfed and digested a smaller cell, exposing its enzymes for use by the larger cell.

• two cells merged into one cell, improving the enzyme function of the new cell.

The function of chloroplasts is

• cellular respiration

• lipid synthesis

• photosynthesis.

• intracellular digestion.

Tags

NGSS.HS-LS2-5

NGSS.HS-LS1-5

The function of mitochondria is

• cellular respiration.

• lipid synthesis.

• photosynthesis.

• intracellular digestion.

Tags

NGSS.HS-LS2-5

NGSS.HS-LS1-7