Which of the following correctly describes a difference between RNA & DNA polymerases? RNA polymerases usually synthesize introns, while DNA polymerases synthesize cistrons. O DNA polymerases usually require a primer, while most RNA polymerases do not. RNA polymerases polymerize 5' → 3', while DNA polymerases polymerize 3'→ 5'! RNA polymerases usually do not need a template, while DNA polymerases do.

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
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Which of the following correctly describes a
difference between RNA & DNA
polymerases?
RNA polymerases usually synthesize introns,
while DNA polymerases synthesize cistrons.
DNA polymerases usually require a primer,
while most RNA polymerases do not.
RNA polymerases polymerize 5' → 3', while
DNA polymerases polymerize 3' → 5'.
RNA polymerases usually do not need a
template, while DNA polymerases do.
Transcribed Image Text:Which of the following correctly describes a difference between RNA & DNA polymerases? RNA polymerases usually synthesize introns, while DNA polymerases synthesize cistrons. DNA polymerases usually require a primer, while most RNA polymerases do not. RNA polymerases polymerize 5' → 3', while DNA polymerases polymerize 3' → 5'. RNA polymerases usually do not need a template, while DNA polymerases do.
Cell membranes typically display asymmetry.
What does this mean?
The fatty acyl chain on C-1 of a membrane
lipid is usually different from that on C-3.
O Only one stereoisomer is ever seen at the
chiral C-2 of the glycerol residue in a
membrane lipid.
The two leaves of a bilayer contain different
collections of lipids and proteins.
O Membrane lipids only have cis double bonds,
never trans.
Transcribed Image Text:Cell membranes typically display asymmetry. What does this mean? The fatty acyl chain on C-1 of a membrane lipid is usually different from that on C-3. O Only one stereoisomer is ever seen at the chiral C-2 of the glycerol residue in a membrane lipid. The two leaves of a bilayer contain different collections of lipids and proteins. O Membrane lipids only have cis double bonds, never trans.
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