What is an open reading frame (ORF)?
a. a protein coding sequence plus associated regulatory sequences
b. the sequence between and including a start codon and an stop codon
c. the sequence between and including a start codon and an stop codon, minus the introns
d. the sequence between and including a start codon and an stop codon, minus the exons
e. the sequence between a start codon and stop codon in prokaryotes only
ANSWER: b
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Answer the following statement true (T) or false (F)
Activities that occur in the cytoplasm include all of the following EXCEPT ____
a. conduction of stimulatory signals b. photosynthesis c. synthesis of DNA d. protein synthesis e. various metabolic reactions
A chromosome that has a centrally-placed centromere is called ____________________.Fill in the blank(s) with the appropriate word(s)
Gram-positive cultures older than 24 hours may stain Gram negative due to changes in the peptidoglycan layer.
A) True B) False