What is the difference between free and attached ribosomes?
A) Free ribosomes are located in the cytoplasm, whereas attached ribosomes are embedded on the endoplasmic reticulum.
B) Free ribosomes are readily "used up" by the cell and are replaced frequently, whereas attached ribosomes remain functional for the lifetime of the cell.
C) Free ribosomes produce proteins, whereas attached ribosomes produce carbohydrates.
D) Free ribosomes produce proteins that are exported from the cell, whereas attached ribosomes make proteins for mitochondria and chloroplasts.
A
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Which of the following is caused by a protozoan infection?
A. malaria B. yellow fever C. tularemia D. infectious mononucleosis
Crosses between a yellow rat with a yellow rat always produce yellow offspring. Crosses between a white rat with a
white rat always produce white offspring. The alleles affect the same aspect of coat color. The cross of a white rat with a yellow rat produces a cream rat. If you cross two cream rats, what will be the ratios of phenotypes of the offspring? What will be an ideal response?
Which of the following is not a function of the cerebrum?
Select one: a. maintains posture and balance b. higher thought processes required for learning and memory c. higher thought processes required for language and speech d. receives sensory input e. commands voluntary motor responses
Which of the following is found in eukaryotic cells but not in prokaryotic cells?
A. nucleus B. mitochondria C. endoplasmic reticulum D. lysosomes E. All of the choices are correct.