Which of the following is not a characteristic of life?
A. The ability to reproduce
B. The ability to grow and develop
C. The ability to respond to the environment
D. The ability to move
Answer: D
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In an isotonic contraction of a skeletal muscle,
(a) the tension in the muscle increases. (b) movement occurs. (c) no movement occurs. (d) both a and c occur.
Assume each of the following letters represents an amino acid. What type of gene mutation occurred to produce the following protein sequence?
Normal: JAYBIRDCATPAW Mutated: JAYBIRDBATPAW A. nonsense B. missense C. silent D. sense E. frameshift
What is the correct operational sequence of the three processes listed below?
I. glycolysis II. electron transport chain III. Krebs cycle
a. I ? II ? III b. II ? I ? III c. III ? I ? II d. II ? III ? I e. I ? III ? II
Some enzymes lower activation energy by ____.
A. keeping substrates apart B. orienting substrates randomly C. breaking the laws of thermodynamics D. shutting out water molecules E. physically breaking chemical bonds