BIOL 3450 Midterm: Exam 1 - Learning Catalytics
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The type of macromolecule found in highest concentration on a weight basis in a HeLa cell is
protein. | |||||||||||||||||||||||||||
lipid. | |||||||||||||||||||||||||||
polysaccharide. | |||||||||||||||||||||||||||
nucleic acid. | |||||||||||||||||||||||||||
water Co and Zn ions are required by humans in
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Which of the following statements about water is not true?
Water will hydrogen bond into highly ordered structures or "cages" around non-polar molecules. | |||||||||||||||||||||||||||||||||||||||||||
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Water is a key player in the energetics of the hydrophobic effect. | |||||||||||||||||||||||||||||||||||||||||||
In an ice crystal water molecules pack into open lattices consisting of five-membered oxygen rings. | |||||||||||||||||||||||||||||||||||||||||||
At 25 degrees celsius liquid water is about 85% as hydrogen bonded as the water in ice, with each molecule in an average of 3.4 hydrogen bonds. Which of the following is the strongest?
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1.
__________ are fairly small organelles that provide a safe place within the cell to carry out certain biochemical reactions that generate harmful, highly reactive oxygen species. These chemicals are both generated and broken down in the same location.
Lysosomes |
Endosomes |
Peroxisomes |
Nucleosomes 2. Biologists cannot possibly study all living species. Instead, they try to understand cell behavior by studying a select subset of them. Which of the following characteristics are useful in an organism chosen for use as a model in laboratory studies?
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