In an experiment, the control group
a. is not subjected to experimental error.
b. is exposed to experimental treatments.
c. is identical to the one being tested except for the variable being studied.
d. is treated exactly the same as the experimental group, except for the one independent
variable.
e. is statistically the most important part of the experiment
C
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Which one of the following statements about the incorporation of selenocysteine into proteins is true?
A. Selenocysteine is an example of a posttranslational modification. B. The tRNA used to translate selenocysteine at a stop codon is first charged with serine. C. The tRNA used to translate selenocysteine at a stop codon has an anticodon sequence of UGA. D. The serine bound to the tRNA used to translate selenocysteine at a stop codon is converted to selenocysteine by the enzyme SelB.
Studies of gene mutation frequencies have shown that __________
A) mutations are rare, and genomes are generally stable B) mutation frequencies differ among organisms and also between genes, suggesting certain genes are more susceptible to mutation C) mutation frequencies are consistent between organisms, and each region of DNA is equally susceptible to random mutations D) Both A and B are correct E) Both A and C are correct
When an indirect interaction is beneficial to one of two interacting species and neutral to the other, the indirect interaction is termed indirect ________
Fill in the blank(s) with correct word
Most cells of higher plants have a cell wall outside the plasma membrane. What is the function of the cell wall?
What will be an ideal response?