For diffusion to occur ____ is necessary.
A. a concentration gradient
B. a differentially permeable membrane
C. temperature above 0°C
D. a carrier molecule
A. a concentration gradient
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____ are produced by B cells and possess antibodies attached to their cell surfaces. The cells play a pivotal role in the secondary immune response
Fill in the blank with the appropriate word.
Answer the following statements true (T) or false (F)
1. Reactions that produce glucose have less entropy than those that oxidize glucose. 2. A reaction with a ?G 0 is endergonic and requires a net input of energy. 3. Enzymes are consumed in chemical reactions and must therefore be replenished. 4. Temperature, pH, and ionic concentrations play an important role in the proper functioning of enzymes. 5. Noncompetitive inhibition within a metabolic pathway prevents excess accumulation of the pathway's product. This occurs when the product binds the active site of an enzyme, reducing its activity, and the subsequent accumulation of product.
What are the functional units of the kidneys?
What will be an ideal response?
Tightly curled or wooly hair is caused by a dominant gene in humans. If a heterozygous curly-haired person marries a person with straight hair, what percentage of their offspring would be expected to have straight hair?
A) 75% curly B) 50% straight C) 25% curly D) 100% straight E) It is impossible to predict the outcome.