UV radiation is a useful tool in producing mutants of microbial cultures
Indicate whether the statement is true or false.
Answer: TRUE
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Which of the following is true about the chemical bonds found in proteins and nucleic acids?
A. Covalent bonds result when an electron is completely transferred to another atom such that the atoms are drawn together by electrostatic charges. B. Ionic bonds result when two atoms share electrons equally. C. Atoms having a small difference between their electronegativities are more likely to form covalent bonds. D. Ionic bonds are most likely to form between two metal atoms. E. The strength of a covalent bond can vary with the salt concentration of the environment.
The ________ pathway uses a set of proteins that bind to ends of two broken DNA fragments and join them together
Fill in the blank with correct word.
Which of the following statements is FALSE?
A) the greater the evolutionary distance between two organisms, the greater the difference in the amino acid sequences of their proteins B) Genes that encode members of a protein fmaily are though to have arisen from a single ancestral gene C) Proteins ar ebiochemical adaptations that are subject to evolutionary change D) Small changed in amino acid sequence may have dramatic effect son protein shape E) Proteins with identical sequences of amino acids must also have identical folding patters
Which type of animal would you dissect to locate a nephridium?
A) Reptile B) Bird C) Insect D) Earthworm E) Flatworm