Why is it important that the glycerol heads of the cell membrane be facing toward the extracellular and intracellular environment?
a. They are hydrophilic.
b. They are hydrophobic.
c. They have both hydrophilic and hydrophobic properties.
d. They have neither hydrophilic or hydrophobic properties.
a. They are hydrophilic.
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Nearly half of mammal species are ________
a. bats b. rodents c. marsupials d. aquatic
Four of the five answers listed below directly affect another endocrine gland. Select the exception
a. cortisol b. corticotropin c. luteinizing hormone d. follicle-stimulating hormone e. angiotensin
In gene expression, ________
A) DNA directs the synthesis of a polypeptide that directs the synthesis of RNA B) RNA determines the sequence of DNA, which directs the synthesis of polypeptides C) DNA directs the synthesis of RNA that directs the synthesis of a polypeptide D) polypeptides direct the synthesis for both RNA and DNA
What term describes a harmless, noncancerous or precancerous tumor?
A) benign B) carcinogenic C) malignant D) metastatic