The most abundance compound in most living things is
a) carbon dioxide
b) water
c) sodium chloride
d) sugar
Answer: b) water
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Refer to the figure above. What is the function of the ACC sequence at the end?
A) It attaches to an amino acid. B) It base pairs with the codon of mRNA. C) It stabilizes the tRNA-amino acid complex. D) It is the active site of this ribozyme.
Turner’s syndrome individuals have how many chromosomes?
a. 23 b. 24 c. 45 d. 46 e. 47
During a race such as a marathon, the skeletal muscle cells in your legs use a lot of energy to continually contract and power your muscles. What organelle is most likely abundant in skeletal muscle cells?
A) mitochondria B) Golgi apparatus C) smooth endoplasmic reticulum D) rough endoplasmic reticulum
The source of energy for nearly all ecosystems is
A. the sun. B. food. C. oxygen. D. water.