Which class of nucleic acid delivers amino acids to ribosomes?
A) mRNA
B) tRNA
C) rRNA
D) DNA
Answer: B) tRNA
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Genes encoding ________ are widely used as target genes in molecular biodiversity studies
A) ATPases B) DNA polymerase III C) 16S rRNA D) RNA polymerase
A pear plant with the genotype Aa can produce gametes containing:a
either A or Aa. b. only the dominant A. c. only the recessive a. d. either A or a. e. either AA, Aa, or aa.
It is possible for a repressor to negatively regulate the expression of an operon because:
A. the repressor-binding site on the DNA overlaps with the translation start site, thereby preventing the transcription. B. the repressor physically blocks where the activator should be binding on the operator region. C. one of the structural genes expressed in the operon negatively regulates the repressor. D. the repressor-binding site overlaps the promoter site of the operon, allowing it to physically block the binding of RNA polymerase. E. the repressor induces the expression of the inducer by binding to the promoter that comes before the inducer gene.
Axis development is determined by a MATERNAL EFFECT gene in Drosophila. A dominant Bicoid allele is required to set up the correct axis development in flies. bb (two loss of function alleles) is LETHAL in this MATERNAL EFFECT gene
A female Drosophila named Eustacia had all dead offspring. What is Eustacia's GENOTYPE? A) Bb or bb B) Bb C) bb D) BB or Bb E) BB