Answer the following questions true (T) or false (F)
1. Even though rubella is a mild, self-limiting disease, vaccination remains important to prevent severe neurological damage to babies whose mothers are exposed to rubella in utero.
2. Methicillin-resistant Staphylococcus aureus (MRSA) cause the same infections as non-resistant S. aureus stains; however, the bacterium has evolved cell-wall building enzymes which do not bind with methicillin and other beta-lactam antibiotics.
3. Because pseudomonads are widespread in the environment and are versatile in their metabolic capabilities, skin infections with these bacteria are common even in healthy people with no skin breaches.
1. TRUE
2. TRUE
3. FALSE
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Asconoid sponges are usually the smallest of all sponges
Indicate whether the statement is true or false
Describe some of the various activities performed by membrane proteins in multicellular organisms. What will be an ideal response?
Sulfanilamide is an antimicrobial drug that mimics the shape of an important substrate for a particular bacterial enzyme, thereby inhibiting the enzyme. This type of inhibition is known as
A) allosteric inhibition. B) competitive inhibition. C) allosteric activation. D) noncompetitive inhibition. E) feedback inhibition.
Yeast cells take up glucose (a sugar) to use as their primary source of energy. Typically, glucose concentrations outside yeast cells are far lower than glucose concentrations inside the cells. Therefore, for yeast to take up glucose, the cells must use:
A) facilitated diffusion to move glucose down its concentration gradient. B) osmosis to directly absorb glucose. C) facilitated diffusion to move glucose up its concentration gradient. D) active transport to move glucose up its concentration gradient. E) active transport to move glucose down its concentration gradient.