An atom or group of atoms with a charge is called a(n)
A. isotope.
B. compound.
C. molecule.
D. ion.
Answer: D
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How can environmental conditions such as salt concentration, temperature, and pH physically affect the enzyme itself?
A) Ions can bind to the active sites of enzymes, preventing the binding of substrate. B) Changes in temperature change the rate at which molecules interact with the enzyme. C) All these factors can disrupt the weak bonds that hold the enzyme in its active conformation. D) These factors affect only the substrate.
Which of the following is the forerunner of the gastrointestinal tract?
a) primitive gut b) foregut c) midgut d) hindgut e) endoderm
If the hematocrit is 47, this means that 47% of the whole blood consists of plasma
Indicate whether the statement is true or false
Which two cavities are continuous with each other?
A) pericardial and pleural B) thoracic and abdominopelvic C) the two pleural cavities D) cranial and spinal