How are the four types of nitrogen-containing bases in DNA held together in the double helix of DNA?
What will be an ideal response?
The bases are held together via hydrogen bonds.
Biology & Microbiology
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B cells and T cells that react with self-antigens are destroyed by
a. apoptosis. b. phagocytosis. c. cytokinesis. d. diakinesis. e. endocytosis.
Biology & Microbiology
Which of the following is NOT involved in the
formation of a blood clot? a. lymphocytes b. fibrinogen c. thrombin d. fibrin e. platelets
Biology & Microbiology
Active transport ________
A) uses ATP as an energy source
B) can move solutes against their concentration gradient
C) can involve the transport of ions
D) all of the answer options
Biology & Microbiology
One of the cell types that support and assist neurons is ____________________.
A. muscle tissue B. glial cell C. neuron D. nervous tissue E. dendrite
Biology & Microbiology