Gina comes home to a sink full of dirty dishes and remarks, “Yuck, what a horrible smell!” She then peels an orange
and sighs, “On, that smells much better!” What allows Gina to distinguish between the different smells?
a. Na+ channels are activated for pleasant smells; Cl- channels for unpleasant smells.
b. The process of sensory adaptation differs from smell to smell.
c. The amplitude of an action potential is higher for pleasant smells.
d. The combination of activated receptors differs from smell to smell.
e. Unpleasant smells activate more receptors than pleasant smells.
d
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Codon usage and even the genetic code itself varies from one organism to the next
Indicate whether the statement is true or false.
Which of the following statements about DNA replication is INCORRECT?
A. It begins at multiple origins of replication sites along eukaryotic chromosomes. B. It proceeds with the addition of new nucleotides to the 3? end of a growing DNA strand. C. It is powered by the hydrolysis of ATP. D. Each strand within the DNA double helix is used as a template for synthesis of a new strand. E. It requires that each strand in the double helix be separated from the other.
The process of temporarily dropping body temperature to the temperature of the environment for part of the day is called daily ________
Fill in the blank(s) with correct word
Modify the following statement to make it correct: Ribozymes are ribonucleosomes used by bacteria and eukaryotic cells to modify DNA.
A. Ribozymes are ribonucleases used by bacteria and eukaryotic cells to modify RNA. B. Ribozymes are ribonucleosomes used only by eukaryotic cells only to modify RNA. C. Ribozymes are ribonucleases used by bacteria and eukaryotic cells to modify DNA. D. Ribozymes are ribonucleosomes used by bacteria and eukaryotic cells to modify RNA.