A new operon is discovered in bacteria. Transcription of the genes in this operon is blocked by the binding of a protein
to DNA sequences upstream of the operon. This is an example of ____ control.
a. positive
b. negative
c. constitutive
d. posttranscriptional
e. inducible
b
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Transcription and translation may occur simultaneously in prokaryotic cells
Indicate whether the statement is true or false
The first electron acceptor of cellular respiration is ________
A) CO2 B) O2 C) NAD+ D) H2O
Consider a cross to investigate the pea pod texture trait, involving constricted or inflated pods. Mendel found that the traits behave according to a dominant/recessive pattern in which inflated pods were dominant. If you performed this cross and obtained 650 inflated-pod plants in the F2 generation, approximately how many constricted-pod plants would you expect to have?
A. 600 B. 165 C. 217 D. 468
________ are used for cutting DNA molecules into fragments
A) Antisense RNAs B) Mutagens C) DNA polymerase and DNA ligase D) Restriction enzymes E) RNA polymerases