Stanley Miller set out to demonstrate an explanation for the origins of organic molecules using a combination of simple organic molecules, heat and periodic bursts of electricity through the mixture, ultimately producing which kind of molecules?
A) carbohydrates
B) amino acids
C) lipids
D) gl...
Test Bank 2 Exam Questions with
Correct Answers
Stanley Miller set out to demonstrate an explanation for the origins of organic molecules
using a combination of simple organic molecules, heat and periodic bursts of electricity
through the mixture, ultimately producing which kind of molecules?
A) carbohydrates
B) amino acids
C) lipids
D) glycoproteins
E) nucleic acids - Answer-B) amino acids
Glycosylated molecules are those formed with which group of organic compounds?
A) lipids
B) nucleic acids
C) lysosomes
D) cholesterol
E) DNA - Answer-A) lipids
Cells regulate their level of activity by regulating the amount of proteins present in the
cell at any given time, so an up regulation of enzymes would be expected to
A) increase the cell's response that is produced by the reaction catalyzed by the
enzyme.
B) decrease the level of productivity of chemical reactions that rely on them.
C) have no effect on the rate of reactions catalyzed by the enzymes.
D) decrease the rate of reactions catalyzed by the enzymes.
E) both decrease the level of productivity of chemical reactions that rely on them and
decrease the rate of reactions catalyzed by the enzymes. - Answer-A) increase the
cell's response that is produced by the reaction catalyzed by the enzyme.
When an enzyme reaches its saturation point, the amount of
A) substrate for the enzyme to act upon is very high.
B) substrate for the enzyme to act upon is very low.
C) product produced continues to increase.
D) product produced by the enzyme decreases.
E) substrate for the enzyme to act upon is very low and the amount of product produced
by the enzyme decreases. - Answer-A) substrate for the enzyme to act upon is very
high.
Which group of elements makes up more than 90% of the body's mass?
,A) O, H, Na
B) C, Na, K
C) O, Ca, H
D) Ca, C, O
E) O, C, H - Answer-E) O, C, H
The organic molecules known as phospholipids are key components of cell membranes
and composed of which molecules?
A) amino acids
B) nucleotides
C) glycerol
D) fatty acids
E) both glycerol and fatty acids - Answer-E) both glycerol and fatty acids
Chromium is
A) not an element in the periodic table.
B) a protein.
C) a dietary supplement with no natural role in the body.
D) an essential element involved in glucose metabolism. - Answer-D) an essential
element involved in glucose metabolism.
Which of the following is a way to recognize a carbohydrate by looking at its name only?
A) It ends in -ase.
B) It ends in -ose.
C) It begins with nucleo-.
D) It begins with proteo-.
E) It begins with lipo-. - Answer-B) It ends in -ose.
Which of the following is NOT considered an essential element for a living organism?
A) carbon
B) hydrogen
C) mercury
D) oxygen
E) nitrogen - Answer-C) mercury
The largest carbohydrate molecules are called polysaccharides because they are
composed of ________ molecules bonded together with one another.
Essential amino acids that are used to build proteins
A) exist in twenty six different configurations.
B) are linked together by ionic chemical bonds in proteins.
C) can be used medically for both diagnosis and treatment of diseases.
D) are derived from the foods we eat and digest.
E) can only be made by cells within our bodies. - Answer-D) are derived from the foods
we eat and digest.
Which of the following are examples of cations?
A) SO42-
B) Ca2+
C) HPO42-
D) HCO3-
E) Cl- - Answer-B) Ca2+
A positively-charged ion is called a(n)
A) electron.
B) proton.
C) neutron.
D) cation.
E) anion. - Answer-D) cation.
The most important polar molecule is ________ because it is practically a universal
solvent.
A) water
B) bicarbonate
C) sodium chloride
D) magnesium sulfate
E) nucleic acid - Answer-A) water
A molecule referred to as highly soluble is
A) very likely to dissolve in water.
B) not very likely to dissolve in water.
C) called aqueous.
D) very likely to dissolve in water and is called aqueous.
E) not very likely to dissolve in water and is called aqueous. - Answer-A) very likely to
dissolve in water.
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