3. Explain how it is possible to have thousands of different proteins when there are only 20 different amino acids.

The single best indicator of one's ability to sustain high intensity aerobic exercise is: a. Maximal oxygen debt b. Maximal oxygen deficit c. VO2 max d. Maximal Ventilation

The infections that people get while they are in hospitals are commonly resistant to multiple drugs. What is a reason for the increased number of drug-resistant bacteria being found in hospitals?

The glucose making part of photosynthesis takes place in the

Select the characteristic that makes viruses different than bacteria. a.) Viruses are not made out of cells. b.) Pathogenic viruses cause diseases. c.) Viruses are found everywhere. d.) Viruses need to eat almost constantly to remain alive.

How does the skin assist with keeping the body in homeostasis?

Look at the chemical reaction below Magnesium + hydrochloride acid - > magnesium chloride + hydrogen Mg + 2HCI - > MgCI2 + H2 In this reaction Magnesium (Mg) is a reactant or product Hydrogen (H2) is a reactant or product Magnesium chloride (MhCI2)

Where does the primary source of energy needed for life come from? 1) solar energy 2) geothermal energy 3) nuclear energy 4) kinetic energy

Which molecules is not part of the cell membrane? a. lipid b. nucleic acid c. phosphate group d. steriod e. protein?

During dna replication in a human cell, 6 billions bases must be paired properly. which characteristic of dna best allows for high level of accuracy during this process

Which of the following actual (i. e., real) products of biological activity is not likely to be a source of the increases in greenhouse gases observed in recent history? A.