Which virus found in the blood involves infecting certain T lymphocytes and possibly macro-phages?
a. Cytomegalovirus (CMV)
b. Epstein-Barr virus (EBV)
c. Rubella virus
d. Human immunodeficiency virus (HIV)
D
HIV, the virus that causes acquired immunodeficiency syndrome (AIDS), attacks helper T cells and possibly macrophages.
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. Reversible reactions in a cell rarely reach equilibrium because ____
a. the products are generally reactants in other reactions and are thus immediately used b. a cell at equilibrium is dead c. they are highly regulated to prevent overuse of reactants d. cells have no way of measuring the relative ratios of reactants and products e. conditions in the cell change too rapidly for any reaction to ever reach equilibrium
Proteins function ____
a. as energy carriers b. as the ‘backbone’ of the DNA molecule c. as component parts of enzymes d. in energy storage within the cell nucleus e. in transmission of genetic information
Fill in the blanks to complete the following statements
_______________ is an inflammatory condition of the large and small airways of the tracheobronchial tree that occurs in infants. ? Fill in the blank(s) with correct word
Of the following choices, what is the only way for bacteria to enter into plant tissues?
A. Shoot tip B. Intact epidermis C. Lateral bud D. Ground tissue E. Open stomata