How many pairs of chromosomes does the human genome normally have?
A. 6
B. 15
C. 23
D. 38
E. 46
C
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RNA and proteins combine in cells to form structures called ribosomes. Ribosomes contain the active site for peptide bond formation. Based on their chemical structures, do you think protein or RNA molecules actually form the active site within the ribosom
A) protein, because RNA cannot catalyze reactions B) RNA, because proteins cannot catalyze a reaction that involves another protein C) proteins, because only proteins can catalyze a reaction that involves another protein D) It could be either, because both molecules have catalytic properties.
Guidelines suggest that only ____________________ (number) embryo(s) be transferred to the woman's uterus following IVF, in order to reduce the incidence of multiple births
Fill in the blank(s) with correct word
A fecundity table is constructed for a gray squirrel as follows
________________________ x lx bx lxbx 0 1.0 0.0 0.00 1 0.3 2.0 0.60 2 0.15 3.0 0.45 3 0.09 3.0 0.27 4 0.04 2.0 0.08 5 0.01 0.0 0.00 On the basis of these calculations, the net reproductive rate (R0 ) is equal to A) 1.4. B) 1.59. C) 10. D) 15.
A vigorous immune response to a normally harmless substance is called an___________.
A. allergy B. allergen C. autoimmune response D. inflammation E. antibody-mediated immune response