ENTRANCE EXAM: Structure of cell

Which of the following statements are correct?

1. 1. Smooth ER synthesizes lipids and breaks down toxins

2. 2. Lysosomes synthesize polypeptides in both prokaryotes and eukaryotes

3. 3. Ribosomes contain enzymes that break down ingested materials

4. 4. Mitochondria and chloroplasts are energy-converting organelles

• 1, 2

• 1, 3

• 1, 4

• all of the preceding

Which of the following would you expect to find passing through a nuclear pore?

1. ribosome subunit

2. ribosomal protein

3. messenger RNA

4. water

• 1, 2, 3

• 2, 3, 4

• not at all

• all of the preceding

Which of the following cytoplasmic organelles is incorrect?

• 
• 
• 
• 

(a)   are granules composed of RNA and protein; some attached to ER, some free in cytosol

(a)   : Granular body within nucleus; consists of RNA and protein

Name the structure labeled (1)

(a)  

Name the structure labelled (2)

(a)  

Name the structure labelled (3)

(a)  

Choose the underlined part that is incorrect in the following sentence.

The nucleus controls protein synthesis by transcribing its information from DNA into ribosomal RNA (rRNA) molecules, which are then moved into the cytoplasm, where proteins are manufactured by ribosomes.

• nucleus

• ribosomal RNA (rRNA)

• cytoplasm

• ribosomes

Select the sequence that most accurately describes glycoprotein processing in the eukaryotic cell.

1. cis face of Golgi

2. smooth ER

3. rough ER

4. trans face of Golgi

5. transport vesicle

• 1, 2, 3, 4, 5

• 2, 5, 1, 4

• 3, 5, 1, 4

• 2, 3, 4, 5, 1

• 1, 4, 5, 3, 2