Arabinose sugar is used by ara+ bacteria but cannot be used by ara– mutants. When both ara3 and ara5 mutants are introduced into the same recipient via a vector, and the recipients still cannot use arabinose, what can you conclude?
What will be an ideal response?
The mutations are in separate genes.
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Substances that cannot be broken down into simpler substances are called ____________.
A. neutrons B. elements C. compounds D. protons
What processes are responsible for transport of ions such NO3
- and Na+? Do the processes differ and what is the consequence of a failure of transport of the ions?
What will be an ideal response?Which three-carbon molecule is produced by glycolysis, and then enters the Krebs cycle after conversion to
a two-carbon molecule?
a. acetyl CoA b. pyruvate c. glucose d. carbon dioxide e. oxygen
Albinism is a recessive trait controlled by a single gene. If the frequency of albinos in a population is
0.25, what is the expected frequency of heterozygotes for this trait? (Hint: use the Hardy-Weinberg formula) A. 0.25 B. 0.50 C. 0.75 D. 0.90 E. It is not possible to determine with the information provided.