Which of the following is a DNA virus?
A) hepatitis A virus
B) hepatitis B virus
C) hepatitis C virus
D) hepatitis D virus
B) hepatitis B virus
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Water moves via osmosis from an area with a lower solute concentration to an area with a higher solute concentration
Indicate whether the statement is true or false
Throughout the 1920s, Otto Meyerhof, A. V. Hill, and colleagues investigated how cells use energy to power muscle contraction. They determined that during muscle contraction, glycogen is broken down into lactic acid, a product of fermentation. Originally Meyerhof thought that the conversion of glycogen into lactic acid directly powered muscle contraction. This idea was overturned by experiments performed by Einar Lundsgaard. What evidence did Lundsgaard provide to suggest that glycogen breakdown and lactic acid production did not directly power muscle contraction?
A.) inhibition of fermentation of immediately halted muscle contraction B.) creatine phosphate infusions into muscle cells inhibited muscle cell contraction C.) muscle contraction could continue for some time after inhibition of fermentation D.) a pulse of electricity caused muscle contraction in isolated frog muscle tissue
Sponges, cnidarians, and flatworms all lack which characteristic found in most other animal groups?
A) the blastula embryo B) a coelom C) motility D) symmetry E) tissues
STR markers that are used for forensic DNA typing are chosen from separate ___ to avoid any linkage between markers.
What will be an ideal response?