The stroma of a chloroplast is most like which
of the following cellular structures?
a. ribosomes
b. cell membranes
c. the cytoplasm
d. nuclei
e. mitochondria
C
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An important group of peripheral membrane proteins are enzymes such as the phospholipases that cleave the head groups of phospholipids. What properties must these enzymes exhibit?
A) resistance to degradation B) independence from cofactor interaction C) water solubility D) lipid solubility E) membrane-spanning domains
Adaptive radiation is demonstrated by ____
a. the dinosaurs going extinct b. coelecanths remaining similar over hundreds of millions of years c. the evolution of mammals after dinosaurs went extinct d. rats and resistance to warfarin e. warbler body mass and survival
Which of the following microbial control methods result in the most rapid decrease in microbial numbers.
A) Antisepsis B) Sanitation C) Disinfection D) Sterilization
In Escherichia coli, when the lac operons is fully induced (in the presence of lactose)
A. The lac repressor is active and transcription of the lac operon does not occur B. The lac repressor is inactive and transcription of the lac operon does occur C. Lactose cannot be transporter by the cells D. Lactose cannot be cleaved to enter glycolysis