Question

part a - multiple choice questions

1. inhibitors that prevent atp production in cells would most likely affect the

a. ribosomes.
b. mitochondria.
c. golgi apparatus.
d. rough endoplasmic reticulum.

1. cells lacking rough endoplasmic reticulum would not likely be able to produce

a. vesicles.
b. any proteins.
c. steroid hormones.
d. enzymes for secretion.

1. which organelles give off oxygen and use up carbon dioxide?

a. lysosomes.
b. chloroplasts.
c. mitochondria.
d. endoplasmic reticulum.

1. which of the following best describes a function of smooth endoplasmic reticulum?

a. protein storage.
b. communication.
c. energy distribution.
d. intracellular transport.

1. which of the following organelles are rich in rna?

a. ribosomes.
b. lysosomes.
c. mitochondria.
d. transport vesicles.

1. vesicles which fuse with the cell membrane for exocytosis are most likely produced by the

a. ribosomes.
b. golgi apparatus.
c. nuclear membrane.
d. endoplasmic reticulum.

1. which of the following best describes traffic through a nuclear pore?

a. enzymes in; nucleic acids in.
b. enzymes out; nucleic acids in.
c. enzymes in; nucleic acids out.
d. enzymes out; nucleic acids out.

1. where in a cell are steroids produced?

a. nucleus.
b. cytoplasm.
c. rough endoplasmic reticulum.
d. smooth endoplasmic reticulum.

1. which of the following most correctly identifies the sequence of organelles involved in the production and

secretion of a protein?
a. ribosome, golgi apparatus, vesicle, rough er, cell membrane.
b. ribosome, rough er, golgi apparatus, vesicle, cell membrane.
c. rough er, ribosome, vesicle, golgi apparatus, cell membrane.
d. cell membrane, vesicle, ribosome, rough er, golgi apparatus.

Explanation:

1. Mitochondria are the power - houses of the cell and produce ATP. Inhibitors that prevent ATP production would most likely affect mitochondria.
2. Rough endoplasmic reticulum (RER) is involved in protein synthesis. Cells lacking RER would not be able to produce any proteins.
3. Chloroplasts carry out photosynthesis, which uses carbon dioxide and gives off oxygen.
4. Smooth endoplasmic reticulum is involved in intracellular transport.
5. Ribosomes are rich in RNA as they are made up of ribosomal RNA (rRNA) and proteins.
6. Golgi apparatus modifies, sorts, and packages proteins and lipids into vesicles for exocytosis.
7. Enzymes (which are proteins) are synthesized in the cytoplasm and need to enter the nucleus for various nuclear processes. Nucleic acids (DNA and RNA) are present in the nucleus and also need to move in (e.g., for replication and transcription) and out (e.g., mRNA moving out for translation).
8. Steroids are produced in the smooth endoplasmic reticulum.
9. Proteins are first synthesized on ribosomes. Then, if they are to be secreted, they move to the rough endoplasmic reticulum (RER) for further processing. From the RER, they go to the Golgi apparatus for modification, sorting, and packaging. Finally, the vesicles from the Golgi fuse with the cell membrane for secretion.

Answer:

1. B. mitochondria
2. B. any proteins
3. B. Chloroplasts
4. D. Intracellular transport
5. A. ribosomes
6. B. Golgi apparatus
7. A. Enzymes in; nucleic acids in
8. D. Smooth endoplasmic reticulum
9. B. Ribosome, rough ER, Golgi apparatus, vesicle, cell membrane