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Ganezh [65]
4 years ago
6

What pathogen is the most important contributor to biofilms in plaque?

Biology
1 answer:
k0ka [10]4 years ago
7 0

Answer:

Streptococcus mutans

Explanation:

Tooth decay results from metabolic activity of the microbes which live on  teeth.  

A layer of carbohydrates and the proteins forms when the teeth which is clean come into contact with the saliva.  

Certain microbes are attracted to these biomolecular food source and thus form a biofilm which is known as plaque.  

<u>Streptococcus mutans is the most important cariogenic species.  </u>

When a disaccharide sugar from the food, is broken down by the bacteria in mouth, the units glucose and the fructose are produced. Glucose is used to make the dextran, which is part of extracellular matrix of biofilm. Fructose is fermented which produces organic acids which dissolve minerals of  tooth. The plaque biofilm overtime become thick and calcify eventually.

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Carla was recently diagnosed with a brain tumour and has since completely lost
Eduardwww [97]

Answer:

hypothalamus

Explanation:

Hunger is partly controlled by a part of your brain called the hypothalamus, your blood sugar (glucose) level, how empty your stomach and intestines are, and certain hormone levels in your body. Fullness is a feeling of being satisfied.

6 0
3 years ago
State how the amino acid sequence you obtained from the gene fragment for botana curus compares with the sequences for the other
coldgirl [10]

The amino acid sequence in protein from the gene fragment for botana curus is the same with species Z that is valine, histidine, leucine, threonine, proline, glutamine and glutamine. Meanwhile, species X and species Y has different amino acid sequence compared to botana curus. Therefore, species Z is most closely related to botana curus because both species has the same amino acid sequence and has similar sized DNA fragments.

3 0
4 years ago
Read 2 more answers
Juniper is a desert plant that produces toxins. Unlike most animals, a type of rodent called Stephen's woodrat is able to eat ju
Dima020 [189]

Answer:

D.

Explanation:

Juniper becomes a food source for them as they gain the enzyme that digests it over many generations.

3 0
3 years ago
Imagine a genetic counselor working with a couple who have just had a child who is suffering from Tay-Sachs disease. Neither par
Alexxx [7]

Answer:

C. "Because you have had one child with Tay-Sachs, you must each carry the allele. Any child you have has a 25% chance of having the disease

Explanation:

Tay-Sachs disease is an autosomal recessive disorder that means a child will acquire the phenotype or we can say disease only when both the alleles which cause disease are present in the child.

Here, in this condition neither parent has Tay-Sachs but they gave birth to a child who is suffering from the disease then it simply means that both the parents are carrier of this disease i.e. they both are heterozygous.

The cross and probability of healthy and diseased child is shown as under:

                          Mother        Father

Parents                    Tt               Tt

                              /        |          |     \

Off-springs         TT      Tt       Tt      tt

<u>Out of these 4 probable off-springs only 3 with genotype TT, Tt & Tt  will be healthy while the 1 with genotype tt will be diseased.</u><u> </u><u>So, the probability of diseased child is 1/4 which is 25%. </u>

Also, the birth of children is an independent event so if one child has already been born with this disease then it doesn't mean that the next 3 children will be healthy for sure i.e. birth of first child cannot influence the next child. In short we can also say that in the next birth, there is still 25% chance of the child being born with this disease because previous birth has nothing to do with next birth.

7 0
3 years ago
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