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3 years ago

A. It is easier to break down glucose into its component monosaccharides.

Biology

1 answer:

pentagon [3]3 years ago

4 0

Answer:

Option E

Explanation:

Complete question is

Why would you expect the energy present in the bonds of glucose to be more readily available than the energy from the sugar lactose?

a. It is easier to break down glucose into its component monosaccharides.

b. Glucose has fewer double bonds than lactose, making it easier to break down.

c. Both glucose and lactose are simple sugars; some people, however, have difficulty breaking down lactose.

d. Lactose is a complex carbohydrate and requires a lot of breaking down before the energy can be accessed.

e. Glucose is a simple sugar, and no additional processing is necessary to access the energy in the carbon-hydrogen bonds

Solution -

The structure of glucose is very simple as it is a monosaccharide i.e it has only one sugar molecule. On the other hand the lactose is disaccharide which means it has two sugar molecules. Being a monosaccharide, glucose cannot be further broken down into simple sugar molecules while on the other hand lactose can be broken down into simpler sugars (monosaccharide) by input of energy.

Thus, glucose is readily available carb based energy resources which can be directly converted into energy or converted into glycogen for storage in cells.

Thus, option E is correct

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A plasmid _____________________________ . A. can confer antibiotic resistance to a bacterium. B. is a single-stranded circular D

hodyreva [135]

Answer:

The correct answer will be option A.

Explanation:

The bacteria organize its genetic material in the single circular chromosome suspended in the cytosol along with additional circular double-stranded DNA molecule called plasmid.

The plasmid is present as a separate structure in the cytoplasm which performs important functions during stressful conditions in the bacteria like providing antibiotic resistance to the bacteria, formation of filial factors during conjugation and many others.

The plasmid which confers resistant to the bacteria is known as the R-plasmid. The R-plasmid consists of r-determinants which confers antibiotic resistance to the bacteria and resistance transfer factor (RTF) which helps in plasmid transfer.

Thus, option A is the correct answer.

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4 years ago

A species that is likely in the near future to become endangered would best be characterized as which of the following?

Nata [24]

It is between A and B.
But if the species is going to be extinct, that means that they are being threatened.
So the answer is B.

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3 years ago

A person who is ill with a fever will experience a(n) a person who is ill with a fever will experience a(n) decreased basal meta

prohojiy [21]

A person who is ill with fever will experience an increased basal metabolic rate. The body’s metabolism contains all of the chemical and biological process needed for the conversion of food into energy and the use of it like digestion and excretion. So when we become sick, the metabolism speeds up to fight the illness.

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4 years ago

__is the five-carbon sugar found in DNA

rewona [7]

Deoxyribose.

And the five carbon sugar in RNA is ribose

8 0

4 years ago

Read 2 more answers

Match the scientist(s) with their contribution to what we now know about DNA.

Lerok [7]

Hi,

Here are the answers:

1) Rosalind Franklin and Maurice Wilkens

Found DNA to be a helix structure because of their x-ray crystallography

During 1953, Rosalind Franklin and Maurice Wilkens attempted to explore the structure of DNA by firing the x-rays on the fibres of DNA. X-rays were scattered when they hit the DNA and later detected on the photographic film. The image on photographic film indicated that DNA had a helical structure. This served as a basis for further analysis of DNA structure by coming scientists, most importantly Watson and Crick.

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2) Alfred Hershey and Martha Chase:

Conclusively proved DNA is the hereditary molecule with their work with bacteriophages.

Harshey and Chase, did experimentation on a bacteriophage called T2. During their experiment, they infected some bacteria E-coli with T2. They used radioactively labelled S and P atoms in the protein coat and DNA of virus respectively. When the virus infected bacteriophage, they found that the radioactively labelled P atoms were found in bacteriophage but S were not found. Now, as we know that S- Sulphur atoms become part of protein coat of virus and when virus infects bacteria, protein remains outside. Only DNA containing P-Phosphorus is injected in bacteria. They, proved that hereditary molecule was DNA and not proteins. Their experimentation was a great breakthrough in the field of Biology and it paved the paths for better understanding of DNA by coming generation of scientists.

******************************

3) Avery, McLoed and McCarty:

Determined Griffith's transforming factor was DNA

Avery, McLoed and McCarty proceeded the experimentation of a scientist Griffith. Griffith used two strains of bacteria Steptococcus pneumonia for his experimentation i.e S strain and R strain. S strain bacteria had capsule of polysaccharide around them and they produced smooth colonies while R strain did not have and produce rough colonies. Griffith killed S strain bacteria and injected in mice, but mice stayed alive. This depicted that polysaccharide coat was not responsible for the death of mice.

He then injected the mice with live S strains along with some dead R strains. The mice died of pneumonia. So Griffith thought that something was transferred from dead R strains into the S strains due to which they became infectious.

In 1944, Avery, McLoed and McCarty, continued his experimentation and proved that the molecule that was transferred from R strain to S stain was DNA and DNA is basically the transforming factor.

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4) James Watson and Frances Crick:

Determined DNA to be double helix structure

In 1953, using the work of Rosalind and Franklin, two scientists James Watson and Frances Crick got successful in creating a perfect three dimensional structure of a DNA molecule. They described their model as double helix that is composed of backbones of sugar and phosphate molecules that are held together through bonding between nitrogenous bases. They also proposed that there exists hydrogen bonding between nitrogenous bases, purines and pyrimidines.

**********************************

5) Erwin Chargaff:

Determined base pair ruling and that percentages of bases is species specific.

Erwin Chargaff studied the DNA of different living organisms and gave out a rule called Chargaff's rule. His rule also contributed and helped in the understanding and preparation of DNA structure by Watson and Crick. According to his rule, In the DNA of any cell at any time, the amount of guanine units is equal to the amount of cytosine units, and the amount of adenine units is equal to the amount of thymine units. This gave an important clue about the complementary bonding of bases i.e Adenine always pairs with Thymine and Guanine always pairs with Cytosine.

Hope it helps! :)

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4 years ago