Most genetic diseases result from mutations that cause a gene to produce a non-functioning _____, which in turn blocks the functioning of a metabolic pathway
a) histone
b) polysaccharide
c) t-RNA
d) enzyme
e) codon
Answer: d) enzyme
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________ was the first to describe microorganisms, while ________ was the first person to see bacteria
A) Antoni van Leeuwenhoek / Robert Hook B) Antoni van Leeuwenhoek / Robert Koch C) Robert Hooke / Antoni van Leeuwenhoek D) Robert Koch / Antoni van Leeuwenhoek
Chemical reactions are classified as exergonic if ________
a. they involve gain or loss of atoms b. they need a boost of energy to begin c. they end with a net release of energy d. the bonds in the reactants have more energy than the bonds in the products
Fragile-X syndrome (or Martin-Bell syndrome) is the most common form of inherited mental retardation in humans. Is it more common in males or females? What is FMR1?
What will be an ideal response?
Refer to Figure 49-1. Which of the following hormones is secreted by the adrenal cortex?
a. 1 b. 2 c. 4 d. 6 e. 8