What is the phenotype and genotype of the chicks?
What will be an ideal response?
This must represent a cross (BBrr × bbRR), which results in all the F1 genotypes being heterozygous (BbRr). The phenotype is blue rose.
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What is the result of calcium flow through NMDA receptors in a synapse where little glutamate has been released from the presynaptic terminal?
a. NMDA receptors are removed from the postsynaptic terminal. b. NMDA receptors are added to the postsynaptic terminal. c. AMPA receptors are removed from the postsynaptic terminal. d. AMPA receptors are added to the postsynaptic terminal.
Ribozymes were discovered ________ protein enzymes, even though they ________
A) before; only catalyze one type of cellular reaction B) before; are more heat labile than protein enzymes C) after; catalyze many important cellular reactions D) after; are the only catalysts found in bacteria and archaea E) at the same time as; only catalyze one type of cellular reaction
Proteins that function as a catalyst
A) slow down the speed at which chemical reactions occur but do not alter the final products formed. B) facilitate chemical reactions by altering the final products formed. C) maintain primary structure. D) can participate only in reactions that synthesize new products. E) are referred to as enzymes.
Muscular dystrophy is caused by a mutation in dystrophin, and intracellular protein that binds to the cytoskeleton. Dystrophin also binds to ________, which is found in the plasma membrane of the cell and binds the extracellular matrix.
A. an actin filament B. a tight junction C. an integrin D. a cadherin E. a gap junction