Which of the following directly pertain to inhibition of cellular protein synthesis by antimicrobial agents?
A) cellular cytoplasm is lost
B) binding and inhibition of RNA polymerase
C) imitation or molecular mimicry of normal molecules
D) interferes with accurate translation of mRNA message
Ans: C) imitation or molecular mimicry of normal molecules
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The most abundant protein in mammals is collagen. This strong, ropelike molecule is particularly abundant in which tissue?
A. heart muscle B. spinal cord C. ligaments D. skeletal muscle
How does Homo sapiens differ from Homo erectus?
1.H. sapiens has larger facial bones, teeth, and jaw. 2.H. sapiens has a rounder skull. 3.H. sapiens evolved from a different evolutionary lineage than H. erectus. 4.H. sapiens was found in Europe but H. erectus was limited to Africa.
A cross section of a monocot leaf typically shows veins in both cross-section and lengthwise section
____________________ Indicate whether the statement is true or false.
How many copies of each plant chromosome are found in the triploid cells that make up endosperm of a typical plant?
A) 1 B) 2 C) 3 D) 4