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frosja888 [35]
2 years ago
10

Students in biology are studying the macromolecules of life. They used a calorimeter to determine the calories in various types

of food. Once the lab was completed, the students ate the left over food samples. Monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. Elaborate on what happened chemically while chewing the saltine. Include the macromolecules present.
Biology
2 answers:
fiasKO [112]2 years ago
6 0

Three macromolecules are represented. The saltine is a carbohydrate. Nucleic acids direct digestion. Digestion took place in Monica's mouth thanks to enzymes or proteins.

SpyIntel [72]2 years ago
4 0

As the epithelial cells in the digestive system can absorb only simpler particles, complex molecules such as proteins, lipids, etc must be broken down.

This process begins with the ingestion of food and takes place in the mouth. Through the combined effects of teeth, saliva and tongue, the food is mechanically broken down and the chemical digestion begins through the <em>enzymes  </em>in the saliva.

<em>Carbohydrates </em>are broken down into <em>maltose</em> and <em>oligosaccharides </em>through the enzyme <em>amylase</em>. The digestion for both <em>proteins</em> and <em>lipids</em> begins in the stomach.

<em>Water soluble</em> <em>vitamins</em> can be directly absorbed into the bloodstream, whereas <em>fat soluble vitamins </em>are absorbed in the same way as lipids.

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Alvin is studying a model of the chemical structure of a common nucleic acid. He observes that the nucleic acid consists of four
Leto [7]
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6 0
2 years ago
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Fruit flies have a diploid number of 8, and honeybees have a diploid number of 32. In which case will crossing over have greater
Yanka [14]

Answer:

            The correct option is A.

Explanation:

              As we know that genetic variation that result from crossing over depend on the number of genes and their alleles. When there are more genes in genome the chances of polymorphic loci will increase, which will result into more genetic variation during crossing over.

Forexample:

                    Drosophila melanogaster is a common fruit fly having diploid number of 8 chromosome composed of 122,653,977 base pairs, and about ~17,000 genes.  Honey bees have diploid number of 32 chromosomes composed of approximately 2360000 base pairs, and 10,000 genes.    

Conclusion:

                      As fruit fly genome contain more genes and polymorphic loci, so genetic variation is more likely to be greater in fruit fly.


5 0
2 years ago
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