Most freshwater algae belong to which group?
a. red algae
b. green algae
c. brown algae
d. golden algae
e. blue-green algae
Answer: b
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What is the role of chloroplasts in animals?
A) Produce ATP B) Carry out photosynthesis C) Produce sugars D) None, as animals do not have chloroplasts
A normal muscle cell produces the myosin protein, which allows muscles to contract. You discover a single muscle cell that has tRNAs that do not bind to amino acids. Will the myosin gene be expressed in this muscle cell? Why or why not?
A) yes, because all cells in the body express the myosin gene all of the time B) no, because if the tRNAs do not bind amino acids, then translation cannot occur C) yes, because the myosin gene will be transcribed in the muscle cell nucleus D) no, because the myosin mRNA will likely get broken down in the cytoplasm
A patient shows the presence of antibodies against diphtheria toxin. Which of the following statements is FALSE?
A) The patient may have the disease. B) The patient may have had the disease and has recovered. C) The patient may have been vaccinated. D) A recent transfusion may have passively introduced the antibodies. E) The patient was near someone who had the disease.
This diagram of a cellular structure shows
A. one crossed-over pair of chromosomes
B. two homologous chromosomes
C. one tetrad of chromatids
D. two sister chromatids