Answer the following statements true (T) or false (F)
1. Catabolic and anabolic reactions in living cells involve the transfer of electrons from one molecule to another in reduction-oxidation reactions.
2. Metabolism refers to only those reactions that release energy.
3. The half-life of a molecule is the time it takes for 50% of the molecule to be broken down and recycled.
4. Autophagy is an important process that removes worn-out organelles, recycles components, then releases them into the cytosol.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
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Which of the following represent repeated sequences commonly found in the human genome? (Choose all that apply)
A. several thousand base pair sequences in tandem B. several thousand base pair sequences dispersed throughout the genome C. two or three base pair sequences repeated many times in a row D. two or three pase pair sequences dispersed throughout the genome
Which of the following receptors detects high frequency vibration?
a. Golgi tendon organs b. Meissner’s corpuscles c. Pacinian corpuscles d. Krause end bulbs
The P wave of the ECG represents
A. the depolarization of the atria. B. the contraction of the ventricle. C. the repolarization of the atria. D. the relaxation of the atria. E. the contraction of the atria.
In the mitochondria pyruvate molecules are converted into ____________________ molecules, which can enter the
Krebs cycle reactions. Fill in the blank(s) with the appropriate word(s).