What type of animal tissue may be involved in protection, secretion, and absorption?
a. Epithelial tissue
b. Muscle
c. Adipose
d. Connective tissue
e. Nervous tissue
Ans: a. Epithelial tissue
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Why is it believed that RNA was the first informational molecule to evolve?
a. RNA molecules can replicate into DNA molecules. b. RNA molecules are more central to modern inheritance than DNA. c. RNA molecules degrade more slowly in solution than DNA molecules. d. RNA molecules are much simpler structures than other macromolecules. e. RNA molecules are able to function as both enzymes and substrates for their own replication.
What do primates have at their fingertips and ends of their toes, protected by flattened nails?
A. Proximal digits B. Cuticles C. Veins D. Touch-sensitive pads E. Matrices
Many metabolic pathways are ultimately concerned with ATP; either with the generation of ATP, or with the requirement of ATP for that pathway to function. Why is ATP so important to metabolism?
A. Hydrolysis of ATP is used to drive exergonic reactions B. Hydrolysis of the bond between adenine and ribose in ATP is commonly used to release energy that can be used to drive other cellular reactions C. The phosphate groups of ATP are held together by unstable bonds that can be broken to release energy D. ATP is a protein that serves as the energy currency of cells
Malaria is caused by Plasmodium falciparum, a non-motile protist that contains a cluster of microtubules at one end of the cell. Once injected into the blood stream, these microtubules are used to attach to red blood cells. Plasmodium falciparum is which of the following?
a. A protozoa b. An algae c. A slime mold d. A diatom e. An apicomplexan