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Darya [45]
3 years ago
12

During electrophoresis, DNA molecules can easily be separated according to size because all DNA molecules have the same charge–m

ass ratio and the same shape (long rod). Would you expect RNA molecules to behave in the same manner as DNA during electrophoresis? Why or why not? Klug, William S.. Essentials of Genetics (p. 181). Pearson Education. Kindle Edition.
Biology
1 answer:
Tanya [424]3 years ago
3 0

Answer:

To separate DNA using agarose gel electrophoresis, the DNA is loaded into pre-cast wells in the gel and a current applied.

Explanation:

The phosphate backbone of the DNA (and RNA) molecule is negatively charged, therefore when placed in an electric field, DNA fragments will migrate to the positively charged anode.

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3. jack is using plastic beads to model water molecules in each state of water. how shoule she the beads to represent water mole
just olya [345]

Jack should arrange the beads close together and slide past each other to represent water molecules in a liquid.

<h3>How are the molecules of water arranged when water is in its liquid phase?</h3>
  • Each water molecule contains two atoms of hydrogen and one atom of oxygen, arranged such that one side of the molecule (nearest the hydrogens) is positively charged while the other side (nearest the oxygen) is negatively charged.
  • They’re arranged randomly, and in random motion.
  • In fact, they’re not even keeping the same hydrogen atoms, as they are constantly popping off and reforming on the nanosecond time scale.

To learn more about water molecules,

brainly.com/question/2960517

#SPJ4

7 0
2 years ago
Flow Chart What happens to food and energy when it enters the cell? Finish the description for each organelle. Step 1: Mitochond
torisob [31]

Explanation:

Eukaryotic cells have specialized mechanisms to transport molecules along with membrane-bound organelles like the endoplasmic reticulum that provide a higher surface area for absorption and enable more efficient transportation.

Their structural components (i.e. their makeup) determine their function (what they do). In specific cell types, collected proteins may function as a unit called an organelle. Some organelles are bound by membranes like those that make up the external structure of the cell, with varying compositions of phospholipids and proteins. Several organelles facilitate the digestion of nutrients into metabolites and energy...

  • Step 1: Mitochondria break down food and release energy; In all eukaryotic cells mitochondria are small cellular organelles bound by membranes. The higher concentrations of reactants and solutes, increases metabolic reaction efficiency; these make most of the chemical energy required for powering the biochemical reactions within the cell. This chemical energy is obtained via the breakdown of nutrients from food, and is stored within the molecule ATP. Respiration in the mitochondria utilizes oxygen for the production of ATP in the Krebs’ or Citric acid cycle via the oxidization of pyruvate     (through the process of glycolysis in the cytoplasm) where several metabolites used for building other compounds are produced.
  • Step 2: Lysosomes... Some organelles separate proteins and molecules that may harm the cell by parceling them into membrane-bound organelles for example, proteases bound within lysosomes can break down many structural proteins, and carbohydrates found in food, waste, and cell components
  • Step 3: Vacuoles... Vacuoles are fluid filled organelles which store concentrated amounts of solutes, and waste products. Specialized vacuoles are also used to transport components to the cell membrane for cellular export.
  • Step 4: The endoplasmic reticulum... Most proteins that function in the cytosol (such as actin) or in the nucleus (such as DNA polymerase) are synthesized by free ribosomes. Proteins that function within the endomembrane system (such as lysosomal enzymes) or those that are destined for secretion from the cell (such as insulin) are synthesized by bound ribosomes in the rough endoplasmic reticulum. The rest of the ER, which does not contain ribosomes is called the smooth ER,  and may contain lipids,  enzymes, and other proteins. As a protein destined for the endomembrane system is being synthesized by a ribosome, the first amino acids in the growing polypeptide chain act as a signal sequence. That signal sequence ensures that the ribosome binds to the outer membrane of the ER and that the protein enters the ER lumen.
  • Step 5: Golgi bodies... Like a post office, the golgi complex, or golgi body  recognizes signal sequences and packages these compounds into lysosomes for delivery to their final destination. Lysosomes fuse with the plasma membrane to empty their contents into the extracellular space.

Learn more about cellular life at brainly.com/question/11259903

Learn more about mitochondria at brainly.com/question/8427362

Learn more about mitochondria and similar structures at brainly.com/question/2855039

#LearnWithBrainly

3 0
3 years ago
{20 points} {pls help brainliest}
Maru [420]
<h2>Receptors for hearing are in the cochlea; receptors for balance are in the vestibule.</h2>

Hope this will help....

3 0
3 years ago
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A bold eagle if your trying to be funny lol

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Umnica [9.8K]
Do you have the options?
4 0
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