Answer:
The correct answer is conservative model.
Explanation:
There are 3 hypothesized DNA replication models: semi-conservative, conservative and dispersive model (see figure). Heavy isotope of nitrogen makes diference when density gradient centrifugation experiment conducted and two diffent bands contaning different isotopes of nitrogen are observed. With one band only containing 14N means bacteria only copies one strand in one replication which supports semi conservative model.
Mr. Knowitall is wrong, the correct answer is C.
-able to occur in only a few cells of specialized tissues
(just had the same question on a test)
Answer:
(D) a protein
Explanation:
The plasma membrane has proteins that are macromolecules responsible for the movement of large molecules in and out of the cell. If these proteins are damaged, this movement will be stopped.
In addition to acting preferentially on the transport mechanisms, organizing true tunnels that allow substances to pass into and out of the cell, these proteins function as membrane receptors, charged with receiving signals from substances that carry some message to the cell, favor the Adhesion of adjacent cells in a tissue, moreover, serve as the anchor point for the cytoskeleton.
<span>The
number of the hydrogen atoms in a molecule of 6NH3 is 18.
Because 6 x 3 = 18
6NH3 = 6 ( Nitrogen Hydrogen 3)
So that would be 6 times 3 hydrogen the answer is 18.
Hydrogen atoms are the atoms of the chemical element hydrogen. It usually
contains a single positive charge protons and single negative charge electrons.
It do not have neutrons. It is called as protium with a symbol of 1H</span>
Carbon does have 4 bonds, which makes it pretty universal.
