1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
belka [17]
3 years ago
7

What is the chemical formula of oxygen

Biology
2 answers:
Nonamiya [84]3 years ago
6 0

Hi,

your answer this  question is : O^2

I hpe this helped you out have a great day

FaithRawlins14

Alchen [17]3 years ago
4 0

chemical formula??! do you mean O2

You might be interested in
Ingestion and Respiration are examples of
mart [117]
Hi this is consider breathing. Hope this helps.
8 0
3 years ago
Many species of arachnids are predators, but have no teeth or jaws. how do they obtain nutrients from their prey
IrinaVladis [17]
Arachnids, spider species, most have venom to subdue prey, which run through preys, circulatory system, the venom partially digest the prey to make it digestible for the spider, so they drink the partially digested blood to gain nutrients..
3 0
3 years ago
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
2 years ago
According to the preface to The Pluto Files, what best describes the information the book will include?
julia-pushkina [17]
According to the preface to The Pluto Files, what best describes the information the book will include a record of Pluto's rise and fall as a planet. The said book was originally published last January 26, 2009 by the author <span>Neil deGrasse Tyson.</span>
8 0
3 years ago
Read 2 more answers
2. When diffusion has reached equilibrium, we say that
madam [21]

Answer:

See Below.

Explanation:

The key word here is <em>net. </em>The net movement has reached zero when a system is in equilibrium but there are still motion's going back and forth due to statistics and just random brownian motion.

Think of it this way, if there are 100 people walking forwards in a crowd but 2 are moving against the crowd, the net movement is still forwards because the bulk of people are going in that direction. However, there are still 2 people moving against.

Same here, if we are talking about a diffusion, let's say in the case of osmosis, if most of the solute is moving across a membrane then we'd say its net direction is that way but that doesn't mean that there aren't processes happening in the other direction. Water molecules in osmosis mostly diffuse, chemically speaking (because you can say this biologically in a different way), from the probability of water molecules colliding with each other and passing the membrane so even if there is a net movement in a certain way their random motion can make them go to the other side just as well. If the fact that motion stops at equilibrium were the case a lot of systems, both chemical and biological, would not exist as we know it.

Think net = bulk <u>NOT</u> <em>total</em> or <em>entire.</em>

8 0
3 years ago
Other questions:
  • Rose bushes usually rebloom from year to year. Roses, therefore, would be considered
    6·2 answers
  • 4.) Photosynthesis is often described as two series of reactions, the light dependent and the light-independent or Calvin cycle
    12·1 answer
  • List the four questions asked to determine if a substance is a mineral
    12·1 answer
  • The difference between a leaves on a pine tree and an apple tree
    6·1 answer
  • How do the chromosomes line up in Metaphase l?​
    7·1 answer
  • What biome do bumble bees live in?
    15·1 answer
  • Infer why chloroplasts are found mostly in the leaves of plants.
    5·1 answer
  • Which statements about freshwater sources are true? Check all that apply. B Only about 3 percent of Earth's water is fresh water
    6·2 answers
  • helpppppppp Properties of nonmetals: •_____, low density • Thermal and electrical •____, gaseous at room temperature Groups cont
    15·1 answer
  • 2. Which of the following compounds in living things contain carbon?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!