BIOLOGY HIGH SCHOOL

How does gel electrophoresis work?

Answers

Answer 1
Answer: Here is the simple answer:
It basically rips the DNA into pieces and those pieces are placed into the gel.  The gel has holes throughout the contaioner and allowing the DNA pieces to wiggle through.  These are pulled by an electric potential (or voltage) that attracts the DNA pieces.  The larger the piece of DNA the shorter distance it will travel through the gel.
Answer 2
Answer:

Answer:

Smaller DNA segments move more easily through the gel.

Explanation:

trust me dawg


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MIDDLE SCHOOL

The movement of crust along faults can make mountains, canyons, and other landforms. Is this true or false?

Answers

This is true because crust is the outer layer of the earth and if it moves it could cause earth quakes and other stuff to happen


MIDDLE SCHOOL

Which is not a kingdom in the Eukarya domain​

Answers

Answer:

Archaea

Explanation:

the eukarya domain has four kingdoms primarily protist,fungi,plantar and animalia

Archea I think I spelled that right
HIGH SCHOOL

Similar organisms that can reproduce by interbreeding are members of the same __________________

Answers

Species. They normally have the same # of chromosomes.
HIGH SCHOOL

People with head colds may have difficulty tasting foods. Explain why this happens. Help please.

Answers

This is because your taste and nasal receptors, which are located in the head, are blocked by mucus secreted by your cells.  When blocked by mucus, these receptors cannot absorb the smells from foods and thus the taste is different or no as it is usually remembered as.  
HIGH SCHOOL

According to the Hertzsprung-Russell diagram, what color is our Sun?

Answers

Answer:

Yellow

Explanation:

As per the Hertzsprung-Russell diagram, stars which are hot lie on left hand side of the diagram while the stars which are cool lie on the right hand side of the diagram.  

However while moving from top to bottom on HR diagram, bright stars lie at the top while the faint stars ;lie at the bottom of the diagram.  

However Sun is an average star which has mediocre temperature and luminosity and therefore it lies near to the middle of the diagram.

Hence, it is yellow in color

According to the Hertzsprung-Russell diagram, the sun has a 

luminosity of 1, and is Yellow.

MIDDLE SCHOOL

Which description best explains the role of DNA in the differentiation of the cells within an organism?​

Answers

Answer:

Each cell has the same DNA, so DNA does not play a role in differentiation.

Explanation:

  • All the parts of a person's body has same DNA and same genes.
  • It is the function of RNA to carry genetic code from DNA and function protein synthesis.
  • Although the different cells and tissue have different proteins their DNA is same.
  • The genetic instructions carried by the DNA is RNA and RNA allows cell to create amino acid which is used in gene synthesis, expression and regulation.
HIGH SCHOOL

A species is defined as: organisms that live together. organisms that live in the same area at the same time. a group of similar organisms whose members freely interbreed with one another. all of the organisms that live together in an area, plus the physical environment that they live in. all organisms at a given trophic level within a particular community.

Answers

The answer is habitat because the organisms go to there habitat

HIGH SCHOOL

How many cusps are located on the right atrioventricular valve

Answers

Answer:

3

Explanation:

these are are located between the right upper atrium and lower right ventricle. These cusps are

1.Anterior

2. Septal

3. Posterior.

Anatomically, the base of each cusp is held firmly or anchored by fibrous structure called CHORDAE TENDINEAE.

Thier functions is to pevent regurgitation of the blood and the wall of the right ventricle into the atrium during ventricular systole; contraction of the ventricle.Therefore they blocked the passage and ensured blood flows into the pulmonary arteries to reach the lungs.

Check the attachments for pictures.

HIGH SCHOOL

As a college student, you are trying to be healthy and Calorie conscious by making yourself a lettuce and tomato sandwich for supper. After making the sandwich, you decide it needs something extra. In the store, you find bacon (20 g of fat), lean chicken (20 g of protein), or sprouts (20 g of carbohydrates) that you would add. Which of these would provide the lowest Calorie count for your sandwich? a. The sprouts would add the fewest Calories.
b. Both meats would be identical if you add 20 g of each.
c. The sprouts or the chicken would add the fewest Calories.
d. The bacon would add the fewest Calories.
e. The chicken would add the fewest Calories.

Answers

The correct answer is C. The sprouts or the chicken would add the fewest Calories.

Explanation:

The calories refer to the amount of energy food contain, these are necessary to design nutritions plans, diets and keep a healthy weight. Additionally, the number of calories depends on the type of food, the size of it and whether it contains mainly fat, protein, carbohydrates, fiber, etc. In this way, 1 gram of fat contains around 9 calories and 1 gram of protein or carbohydrates contains around 4 calories. This implies, in the case presented the sprouts or the chicken add fewest calories as the 20 grames would be equivalent to around 80 calories while the bacon would be equivalent to 160 calories.

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