The classification of bacteria has historically been based on
A) the means of locomotion and thickness of cell wall.
B) microbial nutrition, physical appearance, and how they move.
C) the appearance of colonies and rate of growth.
D) pigments and presence of flagella.
E) nutrient requirements and pigments.
B
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What is the most abundant protein in the human body?
a. polysaccharides b. elastin
c. collagen d. amino acid e. triglycerides
The lack of rust in the oldest existing rocks suggested that the primitive atmosphere had little or no ____
a. oxygen b. nitrogen c. hydrogen
d. water vapor e. carbon dioxide
Enzymes called proteases in the ER lumen catalyze folding of proteins into proper conformations
__________________Indicate whether the statement is true or false.
Which is NOT true regarding temperate phages?
a. They always kill their host once infection begins. b. A host with a temperate phage is called a lysogen. c. The genome of a temperate phage inserted into a host’s chromosome is called a prophage. d. They can cause lysogenic conversion, giving new abilities to their host.