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Archy [21]
3 years ago
14

Which class of glycoconjugates contain both d and l-amino acids?

Biology
2 answers:
Solnce55 [7]3 years ago
5 0
I believe <span>peptidoglycans (Murein) contain both d and I-amino acids.</span>
Blizzard [7]3 years ago
3 0

The right answer is B. peptidoglycans.

Peptidoglycan (or murine, or mucocomplex, or mucopeptide) is a component of the bacterial wall maintaining the shape of cells and providing mechanical protection against osmotic pressure. It forms a thin layer in Gram-negative bacteria and a thick layer in Gram-positive bacteria.

It consists of a carbohydrate moiety (= polysaccharide) and a peptide moiety. The polysaccharide is a glycosaminopeptide polymer wherein N-acetylglucosamine (NAG) and N-acetyl-muramic acid (NAM) are linked by beta (1-4) osidic bonds. This bond can be cut off by lysozyme. NAM is a specific compound of bacterial walls. Two polysaccharides are linked by peptide bridges at the level of the NAM, formed by different amino acids: D-alanine, L-alanine, glutamic acid, L-lysine, diaminopimelic acid (lysine analog). Amino acids D are specific for the bacterial wall, they are never found elsewhere.

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3 years ago
Summarize given the large number of proteins is in the body
natali 33 [55]

Answer:

Enzymes' shapes are important because it determines the specific substrate it will act onto.

Explanation:

The shape of the enzymes are explained by two theories, which are Lock and Key Theory and Induced Fit Theory.

<h3>Lock and Key Theory </h3>

This was first coined by <em>Emil Fischer in 1894</em>. Just like how a key has a specific keyhole, <u>enzymes' active sites are supposed to act on specific substrates to produce a catalyzed effect</u>. Incorrectly shaped keys or enzymes will not fit into a lock (substrate) not assigned for it.

<h3>Induced Fit Theory</h3>

this theory was proposed for the substrates that do not qualify for the Lock-and-Key theory, or <u>enzymes that have more than one active sites</u>. It is said that the <u>substrate determines the final shape of the enzyme</u>, and that the<u> enzyme is somehow pliable</u>. The enzyme is then modified by the substrate to form an enzyme-substrate complex. This explains why two or more enzymes can catalyze a single substrate.

<h3>Additional notes:</h3>

For enzymes to work, they may need specific molecules.

A coenzyme may be <u>metal ions (iron, copper, magnesium)</u> or <u>organic molecules (Vitamins B2, B3, B8)</u> which attach to an enzyme to form a holoenzyme. An apoenzyme is an enzyme with only its protein part sans the cofactor.

8 0
3 years ago
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yarga [219]

Answer:

Internal

Explanation:

During cellular respiration, glucose is broken down in the presence of oxygen to produce carbon dioxide and water. Energy released during the reaction is captured by the energy-carrying molecule ATP.

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It allows more oxygenated blood to be delivered to the muscles. 
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