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Korvikt [17]
3 years ago
9

What are some of the challenges of using or harnessing solar energy?

Biology
1 answer:
sergey [27]3 years ago
7 0
Lack of sunlight in certain areas.
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Proteins are important food nutrients. A technician working at a food company is interested in the nutritional content of seeds/
Vladimir79 [104]

Answer: Sample 1 then, has more variety of proteins but less quantity of each one, while sample 2 has less variety but more quantity of the two proteins present.

Explanation:

Proteins are molecules found in the cells of all living organisms. A protein is composed of monomers called amino acids linked together by peptide bonds. To analyze proteins, a technique called SDS-PAGE (sodium dodecyl sulfate polyacrylamide gel electrophoresis) is used. <u>This technique is used to separate proteins according to their electrophoretic mobility, depending on polypeptide chain length, molecular mass, post-translational modifications and other factors</u>. SDS (sodium dodecylsulfate) is an anionic surfactant compound that breaks non-covalent bonds in proteins, denatures them causing these protein molecules to lose their native conformation and provides the polypeptide with a negative charge that is proportional to the chain length (the number of amino acids) and, therefore, to the molecular mass of the protein. The electrostatic repulsion created by the binding of SDS to the protein is one of the causes of the protein losing its native conformation, thus eliminating the differences in conformation of the different proteins to be separated in the gel.

An electric current is applied to the gel where the proteins are seeded, causing the negatively charged proteins to migrate through the gel in the direction of the anode (positively charged region). Short proteins will move more easily and faster through the pores of the gel, while larger proteins will find it more difficult to do so. After a certain time, the proteins will have migrated according to their size (measured in kDa or kiloDaltons). After electrophoresis, the gel should be stained with Coomassie blue or silver stain, allowing visualization of the separated proteins. After staining, the different proteins will appear as distinct bands on the gel. In addition, the higher the amount of a protein, the more intense the color of its band will be.

Extract No. 1 shows three bands: 25, 30 and 35 kDa. <u>This means that it has three different proteins</u>, each with a different molecular weight. Extract number 2 shows two bands: 25 and 35 kDa. <u>It means that this sample has only 2 proteins. And being bands of higher intensity, we can say that there is more of each protein.</u>

Sample 1 then, has more variety of proteins but less quantity of each one, while sample 2 has less variety but more quantity of the two proteins present.

8 0
3 years ago
What is decreased when lactase is added to milk?
irinina [24]
The answer is A.
Lactose is known as milk sugars.
Therefore giving you your answer- sugars add sweetness.
3 0
3 years ago
Read 2 more answers
A cell with three pairs of chromosomes has the genotype Aa Bb Cc, with each locus on a different chromosome. If this cell were t
denis-greek [22]

Answer:

Same type of daughter cells

Explanation:

The process of mitosis form two daughter cells with the same number of chromosomes but the meiosis form four different daughter cells with a different number of chromosomes.

Also, the meiosis produces genetically different cell as the meiosis I is marked with the crossing over events which produces different genetic combination in the cell.  In the given question, since the cell divides with the mitosis therefore the daughter cells will be produced with the same type of genetic material.

Thus, the same type of daughter cells is correct.

5 0
3 years ago
The nurse is assessing a client whose history includes type 2 diabetes and atrial fibrillation, treated with warfarin. the clien
larisa86 [58]

The correct answer is: Collaborate with the care team to have the client's prothrombin time and international normalized ratio (INR) assessed.

Also, because of the use of anticoagulants like warfarin, the nurse should perform a neurologic assessment (eg, level of consciousness, pupil response, vital signs).


3 0
3 years ago
What tool is used to track inherited traits between parents and offspring? Allelic pair Family tree Pedigree chart Punnett squar
larisa [96]

Answer:

pedigree  chart

Explanation:

A pedigree chart is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors from one generation to the next

5 0
3 years ago
Read 2 more answers
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