Inflammation begins when mast cells in tissue
release __________, which increases blood flow and
also makes capillaries leaky to phagocytes and
plasma proteins. Fill in the blank(s) with the appropriate word(s).
Answer: histamine
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Which of the following statements explains how N-formylmethionine (fMet) is incorporated only in response to the 5'-AUG initiation codon in E. coli, given that methionine has only one codon?
A. There is only one tRNA with the CAU anticodon. B. Only Met-tRNAmet can bind to a specific ribosomal entry site. C. The N-formyl group on methionine prevents fMet from entering interior positions in a polypeptide. D. fMet is always incorporated at interior AUG sites and then deformylated after translation.
In examining glucose transport into a cell, the immediate phosphorylation of glucose following its entry into the cell
A) keeps the glucose from being transported back out of the cell. B) allows the cell to maintain higher levels of glucose outside the cell. C) converts glucose into a form for use in cellular respiration. D) converts glucose into a form to be stored. E) all of the above
Parental care requires time and energy that an individual could otherwise invest in reproducing again. What determines how much parental care is given?
What will be an ideal response?
Which of the following statements is not true of homologous chromosomes?
1.They contain the same genes at the same loci.
2.They contain the same alleles at the same loci.
3.Typically, one is paternal and one is maternal.
4.They may exchange portions during meiosis.