The phospholipids of membranes are:
A) hydrophilic molecules. B) oils.
C) both hydrophilic and hydrophobic molecules. D) hydrophobic molecules.
Answer: C
You might also like to view...
Which of the following best characterizes the process of clonal selection that occurs after exposure to a particular pathogen?
A. B cells show the ability to adapt the specific type of receptors they produce and so all B cells in the body undergo an alteration to respond to a particular infection. B. Only a small subset of B cells will have receptors that bind a particular pathogen and it is specifically these cells that are stimulated to multiply to fight the infection. C. Pathogens typically reproduce clonally and "clonal selection" refers to the process of selection among pathogen lines to determine which are successful during host infection. D. All of the statements are accurate characterizations of the process of clonal selection.
Which of the following elements is correctly matched with its major function in plants?
a. phosphorus?alters membrane permeability b. sulfur?essential part of chlorophyll c. potassium?opens and closes stomata d. carbon?maintains turgidity of cells e. calcium?involved in nitrogen-fixation
Why might traits such as skin color be fairly consistent within a racial group, but alleles for skin color aren't consistent?
A) There's no relationship between alleles and skin color. B) Skin color is influenced by many genes, so several different gene pools can produce the same skin color. C) Only one gene is important in skin color, and when analysis is limited to that gene, there's clear evidence of a long separation of groups. D) Few allele variations between groups are just what you would expect if races were genealogical species.
Suppose that your father is heterozygous for a recessive disorder. Also suppose that you know your mom has two "good" alleles. What is the probability that you will have the disorder?
a. 75% b. 50% c. 25% d. 0%