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Lelu [443]
3 years ago
11

Which of the following statements about the formation of polypeptides from amino acids is true?

Chemistry
1 answer:
Morgarella [4.7K]3 years ago
5 0

Answer:

The answer to your question is letter A.

Explanation:

a. A bond forms between the carboxyl functional group of one amino acid and the amino functional group of the other amino acid.  This is the correct answer because peptide bonding is very specific, only happens between the amino group of one amino acid and the carboxyl group of another.

b. A bond can form between any carbon and nitrogen atom in the two amino acids being joined.  The answer is incorrect because peptide bonding is very specific it can not happen between any carbon or any nitrogen.

c. Polypeptides form by condensation or hydrolysis reactions.  This answer is wrong because hydrolysis does not occur instead of that water is form as a product of this reaction.

d. The reaction occurs through the addition of a water molecule to the am , this answer is wrong, water is formed in this reaction, water is a product of the reaction not a reactant.

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What element has an electron<br> configuration of 2-8-8-1:
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2 years ago
What was removed from the glucose molecules when they bonded to form maltose
steposvetlana [31]

Answer:

Two hydrogen atoms and one oxygen atom (water) was removed.

Explanation:

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3 years ago
All the nonmetals have some similar physical properties.<br><br> True<br> False
miss Akunina [59]
This is false, all non metals have different physical properties.
4 0
3 years ago
Read 2 more answers
____ 26. what is the weight percentage of nitrogen in urea, cn2h4o
Paraphin [41]
Weight percentage of nitrogen can be calculated using the following rule:
weight percentage of nitrogen = (weight of nitrogen / weight of urea) x 100

From the periodic table:
molecular mass of carbon = 12 grams
molecular mass of nitrogen = 14 grams
molecular mass of hydrogen = 1 grams
molecular mass of oxygen = 16 grams

therefore:
mass of nitrogen in urea = 2(14) = 28 grams
mass of urea = 12 + 2(14) + 4(1) + 16 = 60 grams

Substitute with the masses in the equation to get the percentage:
weight percentage of nitrogen = (28/60) x 100 = 46.667%
7 0
3 years ago
A 7.5 L cylinder contains 5 moles of gas at a temperature of 274°C. What is its pressure in kiloPascals (kPa)?
AleksAgata [21]
<h3><u>Answer;</u></h3>

 = 3032.15 kPa

<h3><u>Explanation;</u></h3>

Using the equation;

PV = nRT , where P is the pressure,. V is the volume, n is the number of moles and T is the temperature and R is the gas constant, 0.08206 L. atm. mol−1.

Volume = 7.5 L, T = 274 +273 = 547 K, N = 5 moles

Therefore;

Pressure = nRT/V

               = (5 × 0.08206 × 547)/7.5 L

               = 29.925 atm

But; 1 atm = 101325 pascals

Hence; Pressure = 3032150.63 pascals

                            <u>= 3032.15 kPa</u>

               

3 0
3 years ago
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