Homologous structures among major groups of organisms may differ in _____

a. size
b. shape
c. function
d. all of these


D

Biology & Microbiology

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What cell type secretes interleukin-2 to facilitate B cell proliferation into memory B cells in addition to effector cells?

A) helper T cells B) mast cells C) macrophages D) natural killer cells E) plasma cells

Biology & Microbiology

Proteins are composed of subunits called ____ linked together by chemical bonds

a. nucleotides b. polynucleotides c. mRNAs d. amino acids

e. proteasomes

Biology & Microbiology

The genetic code works only because each codon is read in a specific manner that results in the correct amino acid being placed in that particular spot. What physically places each amino acid by matching up the correct codon?

A) tRNA B) mRNA C) DNA D) rRNA

Biology & Microbiology

Which of the following is/are TRUE regarding vasopressin?

a. vasopressin is also known as antidiuretic hormone (ADH) b. vasopressin increases water retention in the kidney c. vasopressin reduces urine production d." diabetes insipidus" is a condition caused by vasopressin deficiency that results in higher levels of urine production e. all of the above

Biology & Microbiology