In which choice are the entries listed from smallest to largest?
A) DNA building block - gene - chromosome - genome
B) DNA building block - RNA building block - protein
C) Gene - cell - DNA - genome
D) Chromosome - genome - cell - DNA building block
A) DNA building block - gene - chromosome - genome
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Blood sugar is regulated by two pancreatic hormones—insulin and glucagon. When blood sugar rises, insulin is released; it binds to receptors and, through signal transduction, results in an increase in glucose uptake by cells
Blood sugar is regulated by two pancreatic hormonesâ€"insulin and glucagon. When blood sugar rises, insulin is released; it binds to receptors and, through signal transduction, results in an increase in glucose uptake by cells, which effectively lowers blood glucose levels. When blood sugar decreases, glucagon is released, binds to cell receptors, and causes glucose to be released into circulation, thereby increasing blood glucose levels. Diabetes mellitus is a disorder that results from excessively high levels of blood glucose. Type II diabetics have normal to elevated levels of insulin. What, then, might be causing their elevated blood glucose levels? A) inadequate insulin production B) defective receptors C) defective second messenger D) overproduction of glucagon
Amyloplasts are responsible for the colors of ripening fruits or autumn leaves
Indicate whether the statement is true or false.
All living things can be placed within three large categories: consumers, decomposers, or ________
a. prokaryotes b. producers c. animals d. eukaryotes
Emphysema affects about __________ million
people in the United States in a given year. a. 1 b. 2 c. 3 d. 4 e. 5