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Ahat [919]
4 years ago
12

What is the importance of feedback signals at key checkpoints within the cell cycle?

Biology
1 answer:
grigory [225]4 years ago
6 0

to delay or trigger the next phase of cycle

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Most of a cell's molecules can be classified as belonging to one of four major classes: lipids, carbohydrates, nucleotides, or a
goblinko [34]

Answer:

Diagram, in attachments

Explanation:

From the left side of the screen to the right,that is from a structure with a sugar structure with two other molecules  attached to it.

The first molecular structure is Nucleotides. Reasons it contains the middle ribose sugar(5-carbon)connected to the phosphate group and  Nitrogenous bases.This is the structure of nucleotides  and when this is joined by phosphodiester bond between one a nucleotide, to the phosphate group of another  nucleotide molecule  it forms a nucleic acid molecule.

The second structure from left to right with  long carbon chains, it is  a lipid.That js an Ester formed from the reaction of fatty acids with alcohol glycerol.

However, the presence of Phophate group in structure makes it different from a normal tryglycerides.The phosphate group has replaced  one of the  the three fatty acid molecules.Therefore it is called Phospholipid.With one hydropholic ends(phosphate ends) and the hyrophobic end the  carbon chain,with one unsaturated. The lipids molecules are held together my ester bonds.

The next structure is the protein structure(dipeptide).Genrally amino acid is made up of the central Alpha carbon connected on the right by the Carbonyl group(coo-) on the left by the Amine(NH2) group.The R-group which determines the type of amino acids  and hyrdogen atom.In the above structure condensation reaction  has occurred between the hydrogen atom  of  the amine group and carbonyl group of the other amino unit to form a dipeptide.The  bond formed from the condensation is the peptide bond.

The last structure on the far right are the carbohydrate -ring structure and the straight chains.The functional groups of the CHO  -Carbonyl group and hydroxyl group are glues to this.

3 0
3 years ago
Answer number 28!!!!!!!!
nlexa [21]
Ok 28_________________________
4 0
4 years ago
Name the localized root tissue that makes roots grow longer. (three words, spell out)
charle [14.2K]
The root cap??? I think not for sure though.
7 0
3 years ago
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In order, what biomes would you see if you travel from the North Pole to the equator?
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Answer:

hyutrimhl

Explanation:

hgxffcij vkivggcnpppppppppp

3 0
3 years ago
What characteristic do bacteria, fungi, and plants share that other kingdoms do not?
tekilochka [14]
They are eukaryotic and don't move, plants are autotrophic - making their own energy - and have cell walls made of cellulose, but fungi are heterotrophic - taking in food for energy - and have cell walls made of chitin.
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3 years ago
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