The main role of the liver is to ________
A) absorb nutrients
B) absorb water
C) produce bile, which helps the process of digestion
D) break large food into smaller food bits
C
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Answer the following statements true (T) or false (F)
1. If a molecule is added to a glass of water, and is easily dissolved by the water, the added molecule is described as hydrophilic. 2. Cohesion is a property of water in which water molecules tend to stick together. 3. A peptide bond is a covalent bond formed between the amino group of one amino acid and the R group of another amino acid. 4. A substance in which other substances dissolve is called a solute. 5. Vegetable oil is an unsaturated fat from multiple plant sources. Because it is unsaturated, it is composed of at least one pair of double-bonded carbons.
There are __________ molecules of DNA in a
developing human sperm cell at the beginning of prophase I. a. 92 b. 23 c. 46 d. half as many (as compared to somatic cells) e. twice as many (as compared to mature sperm)
The formation of carbohydrates from carbon dioxide and water occurs in the portion of Figure 4-4 labeled:
a. A
b. B
c. C
d. D
e. E
The genes for the enzymes of glycolysis
A) are present in all metabolizing cells, but the genes for specialized proteins are expressed only in particular cell types. B) are present in all metabolizing cells, and the genes for specialized proteins are expressed in all cell types. C) and the genes for all specialized proteins are expressed in all metabolizing cells. D) and the genes for all specialized proteins are expressed in all embryonic cells.