How do fatigued human muscle cells repay an "oxygen debt"?
A) The cells decrease CO2 production.
B) The cells increase production of ATP.
C) The cells convert lactate back to pyruvate.
D) The cells convert glucose to pyruvate.
E) The cells produce more oxygen.
C
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Explain why geneticists believe that almost all chromosomally abnormal embryos and fetuses are eliminated as pregnancy progresses
What will be an ideal response?
A sterile mule is produced by mating a horse and a donkey. this is an example of _______ reproductive isolation.
A. prezygotic B. allopatric C. sympatric D. outgroup E. postzygotic
Scientists have developed bioengineered crops that are more resistant to damage by frost, chemicals, and drought. Crops have been bioengineered also to produce larger crop yields. What is a potential drawback to increased use of bioengineered crops?
A) a loss of genetic variation B) increased disease resistance C) lower food costs D) decreased food supply
Which of the following serves as the "translator" or intermediary between an mRNA codon and an amino acid?
A. siRNA B. snRNA C. rRNA D. snRNPs E. tRNA