How do prokaryotic and eukaryotic chromosomes differ?
A) Eukaryotic chromosomes occur singly, and prokaryotic chromosomes occur as pairs.
B) Genetic information is stored as DNA in eukaryotic cells and as proteins in prokaryotic cells.
C) Prokaryotic chromosomes are not made from nucleotides.
D) Prokaryotic chromosomes are not contained in a membrane-bound organelle.
D
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Which of the following statements is false?
a. Xylem vessels are similar to drinking straws. b. The transport of water in xylem is due to positive pressure generated by the root. c. The stomata of most plants close at night. d. Water is drawn up to the top of a tree by the pull of transpiration. e. Plants absorb the majority of needed elements from water and soil.
The pacemaker is which of the following nodes?
a. sinoatrial b. semilunar c. atrioventricular d. inferior vena cava e. superior vena cava
The science of comparative genomics to study human gene function is possible because much of the human genome is
conserved among other closely related species. Indicate whether the statement is true or false.
Consider a redox reaction between molecules A and B. Molecule A has a redox potential of –100 mV and molecule B has a redox potential of +100 mV
For the transfer of electrons from A to B, is the ?G° positive or negative or zero? Under what conditions will the reverse reaction, transfer of electrons from B to A, occur?