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3 years ago

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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Part a which of these phases encompasses all of the stages of mitosis but no other events?

Tju [1.3M]

The appropriate response is Mitosis. Amid mitosis, the chromosomes, which have just copied, consolidate and append to shaft filaments that draw one duplicate of every chromosome to inverse sides of the cell. The outcome is two hereditarily indistinguishable little girl cores. Whatever is left of the cell may then keep on dividing by cytokinesis to deliver two little girl cells.

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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.

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3 years ago

During which process is energy released 1. external respiration 2. internal respiration

yarga [219]

Answer:

Internal

Explanation:

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3 years ago

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Ratling [72]

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

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3 years ago