Friedrich's Ataxia is a disease associated with
a. a loss of muscle coordination.
b. weak muscles.
c. serious heart problems.
d. a loss of muscle coordination and weak muscles
e. a loss of muscle coordination, weak muscles, and serious heart problems
E
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Which of the following adds RNA nucleotides, one at a time, during transcription?
a. RNA polymerase b. DNA polymerase c. RNA nuclease d. transfer RNA e. ribosomal RNA
Which of the following is not a characteristic of B cells?
A) They carry out cell-mediated immunity. B) They originate in bone marrow. C) They are responsible for the memory response of humoral immunity. D) They are responsible for antibody formation. E) They have antibodies on their surfaces.
Similar to the nucleus, chloroplasts and mitochondria are ________
A) surrounded by two membranes B) able to synthesize carbohydrates C) manufactured by the nucleolus D) able to synthesize lipids
Which of the following actions occurs in many plants when CO2 concentrations are high?
A. Calcium ions are transported faster through the phloem. B. Guard cells lose turgor, and the stomata close. C. CAM photosynthesis fixes CO2 at night. D. Water evaporates at a higher rate than usual. E. Oxygen is used by plants for photosynthesis.