Two intermediates of the sterol biosynthesis pathway, isopentenyl diphosphate and dimethylallyl diphosphate, are used by archaea in the biosynthesis of ________.
A. nucleotides
B. diacylglycerol
C. isoprenoids
D. hormones
Answer: C
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The folding inward of the plasma membrane of an ancestral prokaryote likely evolved into ____
a. the Golgi apparatus b. protists c. DNA d. the nucleus e. mitochondria
The outer layer of bone, referred to as ________, is dense and strong.
A. medulla B. spongy bone C. cortex D. compact bone
The DNA in linear eukaryotic chromosomes is wrapped around proteins called _____________, which keep the DNA from getting tangled and enable an orderly, tight, and efficient packing of the DNA inside the cell.
a. histones b. histamines c. telomeres d. ribosomes e. centromeres
These act as rivets anchoring adjacent cells together at spots throughout the cell.
A. desmosomes B. fibronectin C. hemidesmosomes D. adherens junctions E. focal adhesions