Refer to the figure. Which level of structure is maintained by the disulfide bond?
A) primary
B) secondary
C) tertiary
D) quaternary
Answer: C
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The open ocean is a(n) ________ environment.
A. oligotrophic B. phylotrophic C. eutrophic D. neotrophic
Plant cell walls grow faster in a neutral environment - that is, when the pH is close to 7
Indicate whether the statement is true or false.
The wobble hypothesis states that:a
more than one ribosome can bind to an mRNA molecule. b. some amino acids are coded for by more than one codon. c. there is more than one stop codon in the genetic code. d. a particular amino acid may be linked to more than one type of tRNA molecule. e. certain tRNA anticodons can pair with more than one codon sequence.
An organism has a relatively large number of Hox genes in its genome. Which of the following is not true of this organism?
A) It evolved from evolutionary ancestors that had fewer Hox genes. B) It must have multiple paired appendages along the length of its body. C) It has the genetic potential to have a relatively complex anatomy. D) At least some of its Hox genes owe their existence to gene duplication events. E) Its Hox genes cooperated to produce the positional patterns of this organism as it developed.