Which of the following statements correctly describes a structural or functional difference between the smooth endoplasmic reticulum (SER) and the rough endoplasmic reticulum (RER)?

The RER synthesizes lipids, whereas the SER synthesizes proteins destined for secretion.

The SER is studded with ribosomes, whereas the RER lacks ribosomes entirely.

The RER is associated with ribosomes and produces proteins destined for secretion or membrane insertion, whereas the SER synthesizes lipids and detoxifies substances.

Both the SER and RER produce ATP to power protein synthesis in the cytoplasm.

TEAS Biology Practice Questions — Free Sampler (2026)

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Question 1Cell structure and organelles
Which of the following statements correctly describes a structural or functional difference between the smooth endoplasmic reticulum (SER) and the rough endoplasmic reticulum (RER)?
- AThe RER synthesizes lipids, whereas the SER synthesizes proteins destined for secretion.
- BThe SER is studded with ribosomes, whereas the RER lacks ribosomes entirely.
- CThe RER is associated with ribosomes and produces proteins destined for secretion or membrane insertion, whereas the SER synthesizes lipids and detoxifies substances.
- DBoth the SER and RER produce ATP to power protein synthesis in the cytoplasm.
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Question 2Cellular respiration and photosynthesis
Which molecule is the primary direct energy currency used by cells during both cellular respiration and photosynthesis?
- AGlucose
- BATP
- CNADH
- DCarbon dioxide
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Question 3DNA/RNA, protein synthesis, heredity (Punnett squares)
Which of the following correctly describes the central dogma of molecular biology?
- ADNA → RNA → Protein
- BRNA → DNA → Protein
- CProtein → RNA → DNA
- DDNA → Protein → RNA
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