Treatment for diphtheria requires only penicillin or erythromycin.
Answer the following statement true (T) or false (F)
False
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A cell in G2 before meiosis begins, compared with one of the four cells produced at the end of meiosis II, has
A. twice as much DNA and twice as many chromosomes B. four times as much DNA and twice as many chromosomes C. twice as much DNA but the same number of chromosomes D. four times as much DNA and four times as many chromosomes E. twice as much DNA and half as many chromosomes
Movable bones are found in the
a. cochlea. b. external ear. c. middle ear. d. inner ear. e. organ of Corti.
It is estimated that humans can produce over 1.5 million different types of antibodies. Which of the following statements regarding this extraordinary variation is INCORRECT?
A. We inherit over 1.5 million different and distinct immunoglobulin genes from our parents at fertilization. B. V and J domains of antibody light chains are randomly joined. C. Random segments of DNA can be removed from antibody genes. D. Cytosines in the variable regions of antibody genes can be converted to uracils via hypermutation. E. V and J domains of antibody heavy chains are randomly joined.
Which of the following statements is the MOST accurate comparison of human, bacterial, and fungal cells?
A. Human and fungal cells have similar ribosomes, whereas bacterial ribosomes are different B. Human and bacterial cells have plasmids, whereas fungal cells do not-FALSE C. Human and fungal cells have a similar cell wall, in contrast to bacteria, whose cell wall contains peptidoglycan-[Humans don't have cell walls. FALSE] D. Human cells undergo mitosis, whereas neither bacteria nor fungi do (fungi do)