Match the following items with the correct phrases.
_______1. ____________________ are the “building blocks” of proteins.
_______2. ____________________ consist of a nitrogenous base, a pentose, and a phosphate group.
_______3. ____________________ are the “building blocks” of polysaccharides.
_______4. Sucrose, lactose, and maltose are examples of ____________________.
_______5. Fructose, galactose, and glucose are examples of ____________________.
a. amino acids
b. disaccharides
c. fatty acids
d. monosaccharides
e. nucleotides
1. a. amino acids
2. e. nucleotides
3. d. monosaccharides
4. b. disaccharides
5. d. monosaccharides
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Scientists now believe that comets falling to early Earth played a role in the evolution of life. What role did these comets play?
A) They brought CO2 and H2O. B) They brought ammonia ions (NH4). C) They generated a lot of energy when they hit Earth. D) All of the above are true.
What is thought to be true about the three domains of living things?
a. they diverged from a common ancestor fairly recently b. they diverged from a common ancestor before the evolution of the main groups of eukaryotes c. they did not have a common ancestor d. Domains Bacteria and Archcaea evolved after the main groups of eukaryotes
An infection of the thin layer of tissue around the inner cavities of the heart itself would affect the ________
A) sinoatrial node B) myocardium C) endocardium D) pericardium
The mitochondrial proteins found in the inner membrane are involved in the conversion of ADP to ATP, a source of energy for the cell. This process consumes which of the following substances?
(a) oxygen (b) nitrogen (c) sulfur (d) carbon dioxide