Answer:
This organelle has two major functions: it stores the cell's hereditary material, or DNA, and it coordinates the cell's activities, which include growth, intermediary metabolism, protein synthesis, and reproduction (cell division). Only the cells of advanced organisms, known as eukaryotes, have a nucleus.
Explanation:
Answer:
<u>nucleotides</u>
Explanation:
DNAs are long-chain, helical macromolecules that store genetic information They are made up of varying sequences of covalently bonded monomers called nucleotides. Four types of nucleotides make up the nucleic acid DNA, these include Adenine, Guanine, Cytosine and Thymine.
Unlike other macromolecules, these are typically not used as an energy source and only encode protein synthesis. They comprise a 5-Carbon deoxyribose sugar, one nitrogenous base (adenine, guanine thymine, and cytosine) and a phosphate group.
Nitrogenous bases encourage base-pair formation through hydrogen bonding. Adenine forms double bonds with thymine, while cytosine forms triple bonds with guanine.
Answer: The second option.
Carbohydrate digestion starts in the mouth and protein digestion starts in the stomach.
Carbohydrate digestion starts in the mouth by the mechanical activity of chewing and saliva from the salivary amylase, an enzyme in the salivary glands.
Protein digestion occurs in the stomach where three main enzymes, pepsin secreted by the stomach, and trypsin and chymotrypsin secreted by the pancreas. The enzymes would break down the food proteins into polypeptides and into smaller and smaller pieces until they are amino acids.
Is there answere choices ? or is it to late?
In a nutshell, a chemical change produces a new substance, while a physical change does not. A material may change shapes or forms while undergoing a physical change, but no chemical reactions occur and no new compounds are produced. And for an explanation on how to see the difference Look for an indication that a chemical change occurred. Chemical reactions release or absorb heat or other energy or may produce a gas, odor, color or sound. If you don't see any of these indications, a physical change likely occurred. Be aware a physical change may produce a dramatic change in the appearance of a substance. This doesn't mean a chemical reaction occurred.