Hydrogen peroxide is very toxic to cells.
a. true
b. false
Ans: a. true
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Which of the following is an example of epigenetic inheritance?
A. Expression of the Igf-2 gene based on methylation of the ICR and DMR regions B. Inheritance of flower color as studied by Mendel C. Leaf coloration based on mitochondrial inheritance D. Snail shell twist patterns
What is the name of the protein that helps to regulate multiple checkpoints throughout the cell cycle and is also known as the "guardian of the genome?"
A. Cdk B. Ras C. cyclin D. p53
Fill in the blanks to complete the following statements. ? ?Prolonged use of quinolones may cause _________________, which is the appearance of a new infection with a different strain or species of microorganism, during antibiotic treatment
Fill in the blank(s) with correct word
Which of the following statements about siderophores is FALSE?
A) Siderophores are considered as bacterial virulence factors. B) Siderophores increase permeability of the outer membrane for G- bacteria. C) Siderophores bind iron and transport it into the bacteria. D) Siderophores compete for iron from host proteins transferrin and lactoferrin. E) none of the above.