Organisms that obtain their energy from light can be termed
A. autotrophic. B. holotrophic. C. chemotrophic. D. heterotrophic. E. heliotrophic.

A. autotrophic

Fermentation
A. produces pyruvic acid as an end product.
B. yields less energy per mole of glucose than aerobic respiration. C. occurs only in the presence of oxygen.
D. prevents glycolysis from occurring.
E. converts ethanol to glucose.

B. yields less energy per mole of glucose than aerobic respiration.

In respiration, oxygen
A. combines with lactic acid to form pyruvic acid.
B. acts as a cofactor for glycolytic enzymes.
C. yields energy in the form of ATP as it is passed down the respiratory chain.
D. acts as an acceptor for electrons (and protons), for

D. acts as an acceptor for electrons (and protons), forming water.

An enzyme is added to an aqueous solution of ATP, DNA, albumen, fat and glycogen; the reaction mixture is incubated for 10 minutes. If an analysis of the mixture reveals the presence of all of the above compounds plus glucose, it can be concluded that the

C. glycogen

5. What cellular organelles would you expect to be absent from fungi?
A. Mitochondria
B. Lysosomes
C. Ribosomes
D. Golgi bodies
E. Chloroplasts

E. Chloroplasts

Intracellular organelles that participate in metabolic oxidations involving H2O2 are called
A. centrioles.
B. endoplasmic granules.
C. peroxisomes.
D. lysosomes.
E. macrobodies.

C. peroxisomes.

. The two daughter cells formed by mitosis and cytokinesis have
A. half the number of chromosomes present in the parent cell.
B. half the number of the chromosomes present in the parent cell if this parent cell is found in the testicular or ovarian tissue

C. the same number of chromosomes present in the parent cell

Starch, cellulose and glycogen are all
A. proteins.
B. linked internally by hydrogen bonds.
C. water soluble.
D. polymers of glucose.
E. nucleic acids

D. polymers of glucose.

Each of the following cell organelles have a membranous structure EXCEPT one. Which one is the EXCEPTION?
A. Golgi complex
B. Centrioles
C. Mitochondria
D. Lysosomes
E. Endoplasmic reticulum

B. Centrioles

In anaerobic glycolysis in muscle cells, one mole of glucose is oxidized to
A. six moles of carbon dioxide.
B. two moles of acetic aid
C two moles of lactic acid.
D. two moles of acetyl CoA.
E. two moles of carbon dioxide and six moles of water.

C two moles of lactic acid.

The movement of water soluble molecules through cell membranes, from higher to lower concentrations, by attachment to a carrier protein, describes
A. diffusions.
B. osmosis.
C. pinocytosis.
D. active transport.
E. facilitated diffusion.

E. facilitated diffusion.

As far as their products are concerned, all biosynthetic reactions in living cells result in
A. a more ordered state, therefore a decrease in entropy.
B. a more ordered state, therefore an increase in entropy.
C. energy released in the form of ATP.
D. ene

A. a more ordered state, therefore a decrease in entropy.

Which is the smallest organelle in the cell?
A. Golgi body
B. Nucleus
C. Mitochondrion
D. Ribosome
E. Chloroplast

D. Ribosome

For a given diameter of an axon, one factor which increases the velocity of a nerve impulse is
A. the length of the axon.
B. the ploidy of the nucleus.
C. the density of mitochondria along the axon.
D. maximal stimulation of the neuron
E. the presence of

E. the presence of a myelin sheath

15. Which chiefly stimulates action of the respiratory center?
A. Carbon dioxide in the blood
B. Relaxin
C. Lack of oxygen in the blood
D. Inflation of the alveolus
E. Vagus nerve

A. Carbon dioxide in the blood

The term motor unit refers to
A. an entire muscle.
B. a single muscle fiber.
C. all the muscle fibers innervated by one nerve fiber.
D. all the motor nerves in one muscle.
E. all the sliding filaments of actin and myosin in one muscle fiber.

C. all the muscle fibers innervated by one nerve fiber.

The human heart beat is initiated within the
A. sinus venosus.
B. Hensen's node.
C. conus arteriosus.
D. artio-ventricular node.
E. sino-atrial node.

E. sino-atrial node.