If real-time polymerase chain reaction (PCR) is performed on a Bordetella isolate, then it must be noted that this type of swab is unacceptable for collection because of the presence of which of the following inhibitory factors?
a. Dacron
b. Cotton
c. Rayon
d. Calcium alginate
D
Calcium alginate swabs with aluminum shafts are not recommended for PCR; they may inhibit the polymerase enzyme in PCR detection. In addition, cotton swabs may be inhibitory to speci-men growth and are also not recommended.
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What is the function of bactoprenol?
A) It is a hydrophobic alcohol that transports peptidoglycan precursors across the cytoplasmic membrane. B) It is responsible for forming the peptide cross-links between muramic acid residues in adjacent glycan chains. C) It triggers the recruitment of FtsZ and the initiation of the divisome. D) It supplies the energy necessary for transpeptidation to occur.
Where are ribosomes found inside a cell?
A. Golgi apparatus B. cytosol C. rough endoplasmic reticulum D. both in the cytosol and the rough endoplasmic reticulum
Fats are major constituents of
a. proteins. b. genes. c. photosynthesis. d. cell membranes. e. all of these.
As cleavage progresses, the cells of the embryo _____ and the whole embryo ______.
Fill in the blank(s) with the appropriate word(s).