Describes a molecule containing a carbon and hydrogen together(usually along with others)

__________ are a class of membrane proteins that increase a cell's permeability to certain ions.

lesantik [10]

2. Ionophores because they are class of proteins that move cell membranes. They are small, hydrophobic molecules that increase a cell's permeability to certain ions.

3 0

3 years ago

A. Watch the video B. Answer questions below 0:00 5:05 This In The Clinic video will task you 1x O 1.Briefly explain why S. sali

masya89 [10]

The <em>S. salivarius</em> is chosen because it the predominant gram positive bacteria that colonizes the oral cavity shortly after birth.

Polymerase chain reaction(PCR) test is a type of test that is used to identify a particular deoxyribonucleic acid of an organism.

<em>Streptococcus salivarius</em> cannot be cultured especially when the test sample is contaminated with other body normal flora.

The steps of PCR testing include the following:

Denaturation by heat

Annealing Primer to Target Sequence

Extension

End of the First PCR Cycle

On a crime scene, the specimen that can be used for PCR testing are blood and body secretions.

PCR testing can be done on a scene with blood spills.

Learn more about gel electrophoresis here:

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8 0

2 years ago

In a hardy-weinberg population with two alleles, a and a, that are in equilibrium, the frequency of the allele a is 0. 3. What i

zavuch27 [327]

Here, given-

homozygous alleles 'a' have a frequency of 0.3.

Also the alleles are in equilibrium in a Hardy-Weinberg population. The frequency of individuals that are homozygous for this allele are= 0.49.

The Hardy-Weinberg equilibrium can be defined as the principle which states that the variation in the genetic makeup of a population remains constant and unchanged till there are no external interferences, influencing the population.

Calculation-

$p + q = 1\\0.3 + q= 1\\q= 1- 0.3\\\\q= 0.7$

Then to find the frequency of the individuals homozygous for this allele the following formula needs to be used-

$p^{2} + 2pq + q^{2} =1$

$p^{2} = dominant homozygous frequency\\2pq= heterozygous frequency\\q^{2} = recessive homozygous frequency\\$

Thus, the individuals homozygous for the allele can be calculated by $q^{2} = (0.7)^{2} \\= 0.49$

Learn more about the Hardy-Weinberg equilibrium here-

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4 0

2 years ago

In a study on the biological bases of learning, lab rat a is given a drug that blocks dopamine activity in its brain. thereafter

Anvisha [2.4K]

We should expect that the rat will have have more difficulty in learning the task compared to a normal rat. This is because the rat has been injected with a certain drug that oppresses the dopamine activity. And then the rat is placed in an operant chamber where a lever-pressing task is shaped through positive reinforcement.

8 0

3 years ago

Give an example of a free-living flatworm and a parasitic flatworm

harkovskaia [24]

Free-living flat worms = carnivores or scavengers
Have digestive cavity, mouth, pharynx

Parasitic Flatworms: = Feed on blood, tissue fluids, or pieces of cells from within a host

4 0

3 years ago

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