The atomic number refers to the
a. mass of an atom.
b. number of protons in an atom.
c. number of both protons and neutrons in an atom.
d. number of neutrons in an atom.
e. number of electrons in an atom.
B
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Being obese can lead to all of the following heath issues except for: a. higher blood pressure
b. higher risk for Type 2 diabetes. c. increased risk for various types of cancers. d. cardiovascular disease. e. lower risk for Type 2 diabetes.
Which is the most ancient human species known?
1.Homo ergaster 2.Homo erectus 3.Homo habilis 4.Homo sapiens
Enzyme activity may be regulated by several means. What is the mode of regulation in each of the following examples?
A) allosteric regulation or feedback inhibition B) substrate-level regulation C) inhibition D) proteolytic cleavage 1) When glucose is converted to glucose-6-phosphate by hexokinase, the accumulation of glucose-6-phosphate inhibits the reaction. 2) A foreign substance is added to the reaction in part a above. This substance binds to hexokinase and prevents its ability to catalyze the reaction. E) covalent modification 3) An inactive form of an enzyme becomes active after being phosphorylated. 4) Pepsinogen becomes pepsin after being released into the lumen of the stomach. 5) In a series of enzymatic reactions, it is found that the product of the last reaction inhibits the first enzyme in the series of reactions.
The technique developed by Hans Christian Gram is important for bacterial
A. etiology. B. identification. C. classification. D. isolation. E. epidemiology.