BIOLOGY HIGH SCHOOL

In gel electrophoresis why does the DNA move toward the bottom of the wall of gel? A. DNA is negatively charged. B. DNA is positively charged. C. DNA is extremely heavy. D. DNA is less dense than air.

Answers

Answer 1
Answer:

Answer:

The correct answer is option  A. "DNA is negatively charged".

Explanation:

The molecules of Deoxyribonucleic acid (DNA) have a negative charge because of the negative charge of phosphate component located in its ribose-phosphate backbone. This property of DNA is used during gel electrophoresis to separate the molecules according to its size. One molecule of DNA has a one negative charge, and moves towards the bottom of the wall of the gel because is where the anode is located. The larger the size of the DNA the faster it will move to the anode.
Answer 2
Answer: A. The DNA is negatively charged.

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Which of the following statements regarding taste and smell is true? A. Taste buds wear out and are replaced about every 25 days.
B. Women tend to have a better sense of smell than men.
C. So-called supertasters may be inclined to obesity.
D. People often have a very short memory of smells.

Answers

The answer is c! Hope this help!
A not true

B not true

C could be true

D not true

Which of the following cells would not have a well-defined nucleus but would have a thick cell wall and ribosomes?A) onion cell
B) E. Coli bacteria
C) human brain cell

Answers

The best and most correct answer among the choices provided by your question is the first choice or letter A.

The onion cell would not have a well-defined nucleus but would have a thick cell wall and ribosomes.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

Answer:

A.  

onion cell

Explanation:

Your skin has excretory functions.


TrueFalse

Answers

True because excretory is like sweat and you sweat through your skin- more specifically the pores in your skin

Answer:

true

Explanation:

<3 I know I'm a bit late, lol....but hope you're doing well and having a good day! <3

How does sediment loss affect land and soil quality

Answers

it makes the soil not as thick due to the loss of sediments and it cant hold near as much nutrients to keep up with the plant life 

What do scientists need to look at before developing an argument

Answers

Answer:

The correct answer will be- the procedural steps of scientific method.

Explanation:

Argumentation over a scientific issue is a part of the scientific method which is done at the time when the results are communicated to the scientific community.

Since the scientific investigations are based on the scientific methods, so the basis of the arguments will be the procedural steps of the scientific methods which could be the predicted observations, hypothesis, results, and the validity of the conclusions.

Thus, the procedural steps of the scientific method are the correct answer.
Hi There! :)

What do scientists need to look at before developing an argument?

The validity of data, claims, hypotheses, and observations.

All of the following factors affect an area s biodiversity EXCEPTa. area.
b. number of endangered species.
c. climate.
d. diversity of niches.

Answers

All of the options enlisted here (area, climate, diversity of niches) affect an area's biodiversity except number of endangered species. That in no way affects an area's biodiversity, whereas the other options certainly do. 

Answer:

D

Explanation:
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