Operon(s) in bacteria
A.
refers to a group of genes that are controlled in a coordinate fashion.
B. involve polycistronic mRNA.
C. involve monocistronic mRNA.
D. are also known as Wagnerons.
E.
refers to a group of genes that are controlled in a coordinate fashion AND involve polycistronic mRNA.
E
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When chromosomes have either duplications or deletions, the chances that the mutation will be harmful are a function of:
A. its sizeâ€"the smaller the duplication or deletion, the greater the chance of harm. B. its sizeâ€"the larger the duplication or deletion, the greater the chance of harm. C. its locationâ€"if it occurs in a germ-line cell, it will be more harmful than if it occurs in a somatic cell. D. its position on the chromosomeâ€"if it occurs at the tip of a long arm, it is likely to be less harmful than if it occurs at the tip of a short arm. E. None of the answer options are correct.
The first cloned mammal, Dolly:a
was stillborn. b. developed arthritis and a virus-induced lung cancer at a relatively young age. c. lived a short period of time before suffering advanced aging effects. d. lived to a normal age for sheep. e. lived longer than normal sheep
Stomata are:a
waxy layers that cover leaves. b. openings in the leaf epidermis. c. extensions of bundle sheaths. d. particularly numerous on the upper epidermis. e. guarded by two stipule cells.
The inorganic nonprotein components that participate in enzyme catalysis are known as
A. substrates. B. reactants. C. products. D. cofactors. E. coenzymes.