Why are proteins, polysaccharides, and nucleic acids considered polymers, but lipids are not?
What will be an ideal response?
A polymer is made up of many similar or identical subunits. Proteins, polysaccharides, and nucleic acids are made up of individual monomers linked together to form larger molecules. Lipids are not polymers because they are not composed of many similar structural units linked together to form a large molecule.
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What are the consequences of a viral infection of an animal cell?
A) rapid lysis or latent infections B) lysogeny followed by eventual lysis C) lysis or lysogeny D) Outcomes vary from rapid lysis to persistent infections, latent infections, or cancer.
A nursing infant is able to obtain disease-fighting antibodies, which are large protein molecules, from its mother's milk. These molecules probably enter the cells lining the baby's digestive tract via _____.
A. osmosis B. active transport C. endocytosis D. passive transport
When offspring are born from fertilized eggs that remain inside the female until they hatch, this is termed which of the following?
a. external fertilization b. oviparity c. ovoviparity d. viviparity
Sometimes when a person in a movie is stabbed or cut, blood forcefully sprays out of the wound. This is realistic only if the severed vessel is under a high degree of pressure. Which of the following vessels, if severed, would result in the most forceful
spray of blood? A) pulmonary artery B) inferior vena cava C) capillaries in the body D) aorta