Cosmids are so named because they can be used to express foreign genes in a variety of different hosts.
Answer the following statement true (T) or false (F)
False
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Hydrogen bonds can form between guanine and ____, and between adenine and ____
a. phosphate; sugar b. thymine; cytosine c. cytosine; thymine d. sugar; phosphate e. adenine; guanine
What structural feature of a leaf enables it to obtain CO2 from the air?
A) Chloroplast B) Stomata C) Epidermis D) Cuticle E) Mesophyll
A woman sustains irreversible damage to her left lung after being injured in a fire. Her identical twin sister, who lives in another state, offers to donate one of her lungs to her injured sibling. Would physicians view this as an organ transplant
surgery with a strong chance of success? A) Yes; the identical twins would have highly similar self-proteins, and this would likely minimize rejection by cytotoxic T cells. B) Yes; the identical twins would have highly different self-proteins, and this would likely minimize rejection by B cells. C) No; the identical twins would have highly similar self-proteins, and this would likely minimize rejection by cytotoxic T cells.
Phenylketonuria is an inherited disorder. Affected individuals have a defective enzyme called phenylalanine hydroxylase. The substance that these individuals cannot break down is a(n):
A) carbohydrate. B) nucleic acid. C) protein. D) lipid. E) amino acid.