1. Barbiturates and benzodiazepine drugs bind to GABA receptors to open chloride
ID: 85501 • Letter: 1
Question
1. Barbiturates and benzodiazepine drugs bind to GABA receptors to open chloride channels, inhibit neural impulse, and induce tranquility.
__________________
True
False
2. According to Chargaff’s rules:
the number of A-T base pairs is always equal to the number of G-C base pairs in all DNA molecules.
there is no relationship between the ratio of purine and pyrimidine content in any DNA molecule.
the adenine content in any DNA molecule is always greater than the thymine content.
the guanine content in any DNA molecule is always less than the cytosine content.
the adenine content in any DNA molecule is always equal to the thymine content.
3. A "5 cap":
prevents the binding of ribosomes.
prevents translation.
marks the mRNA for degradation.
is added to mRNA but not pre-mRNA.
protects mRNA from degradation.
4. The term "fluid mosaic model" refers to the:
diffusion of lipid-soluble substances through the lipid bilayer.
solubility of water in the membrane.
method of substance transport across the membrane.
movement of lipids and integral proteins within the lipid bilayer.
movement of surface proteins through the membrane.
a.the number of A-T base pairs is always equal to the number of G-C base pairs in all DNA molecules.
b.there is no relationship between the ratio of purine and pyrimidine content in any DNA molecule.
c.the adenine content in any DNA molecule is always greater than the thymine content.
d.the guanine content in any DNA molecule is always less than the cytosine content.
e.the adenine content in any DNA molecule is always equal to the thymine content.
Explanation / Answer
Many drugs including barbiturates and benzodiazepines GABA receptors are the targets to bind with to open chloride channels which inhibit neural impulses which relatively induce tranquility or calm effect. These are often prescribed to treat anxiety, insomnia and in some cases of seizures.
According to chargaff's rule, DNA from any cell should follow the base pair rule, i.e,
% of adenine = %thymine and
% of guanine = % of cytosine
The 5 cap has 4 functions
The fluid mosaic model describes the cell membrane as a two-dimensional liquid that restricts the lateral diffusion of lipids and protein components that promote the formation of lipid rafts or protein and glycoprotein complexes. The movement is restricted through the viscosity of lipid bilayer.
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