Question

6. Circle and label the functional groups (amino and carboxyl), the R group, and the ? carbon on this amino acid. Which amino acid is this, and what is the pH environment around this amino acid (10 points)? S-H | CH2 | +H3N — C — COOH | H 7. Briefly draw and/or describe the differences in the molecular characteristics of hydrophobic R groups compared to hydrophilic R groups of amino acids (About 3-5 sentences, 10 points). 8. Draw and/or describe the three molecular components that make up nucleotides. And how can you tell the difference between a DNA nucleotide versus and RNA nucleotide (10 points). 9. When describing the nucleic acid sequence of DNA or RNA, there is typically an identification of the 5' and 3' direction of the polynucleotide. Draw and/or describe how the 5' and 3' directions are determined (10 points).

          6. Circle and label the functional groups (amino and carboxyl), the R group, and the ? carbon on this amino acid. Which amino acid is this, and what is the pH environment around this amino acid (10 points)?

S-H
|
CH2
|
+H3N — C — COOH
|
H

7. Briefly draw and/or describe the differences in the molecular characteristics of hydrophobic R groups compared to hydrophilic R groups of amino acids (About 3-5 sentences, 10 points).

8. Draw and/or describe the three molecular components that make up nucleotides. And how can you tell the difference between a DNA nucleotide versus and RNA nucleotide (10 points).

9. When describing the nucleic acid sequence of DNA or RNA, there is typically an identification of the 5' and 3' direction of the polynucleotide. Draw and/or describe how the 5' and 3' directions are determined (10 points).

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6. Circle and label the functional groups (amino and carboxyl), the R group, and the ? carbon on this amino acid. Which amino acid is this, and what is the pH environment around this amino acid (10 points)?

S-H
|
CH2
|
+H3N — C — COOH
|
H

7. Briefly draw and/or describe the differences in the molecular characteristics of hydrophobic R groups compared to hydrophilic R groups of amino acids (About 3-5 sentences, 10 points).

8. Draw and/or describe the three molecular components that make up nucleotides. And how can you tell the difference between a DNA nucleotide versus and RNA nucleotide (10 points).

9. When describing the nucleic acid sequence of DNA or RNA, there is typically an identification of the 5' and 3' direction of the polynucleotide. Draw and/or describe how the 5' and 3' directions are determined (10 points).

Added by Joyce M.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Sri K

06/30/2023

Step 1

First, we need to identify the amino acid and its functional groups. The given structure is: CH3 - CH(NH2) - COOH This is the structure of alanine, an amino acid. The functional groups are the amino group (NH2) and the carboxyl group (COOH). Show more…

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6. Circle and label the functional groups (amino and carboxyl), the R group, and the ̑ carbon on this amino acid. Which amino acid is this, and what is the pH environment around this amino acid (10 points)? 7. Briefly draw and/or describe the differences in the molecular characteristics of hydrophobic R groups compared to hydrophilic R groups of amino acids (About 3-5 sentences, 10 points). 8. Draw and/or describe the three molecular components that make up nucleotides. And how can you tell the difference between a DNA nucleotide versus and RNA nucleotide (10 points). 9. When describing the nucleic acid sequence of DNA or RNA, there is typically an identification of the 5' and 3' direction of the polynucleotide. Draw and/or describe how the 5' and 3' directions are determined (10 points).

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Transcript

00:01 The amino acid we have here is this structure.

00:16 So here the functional group amino is this one, the carboxyl group is this one and furthermore the ph of the environment here is acidic that is low ph.

00:34 This can be evident by the nature of the amino group since it is having an h plus ion.

00:43 So it is very clear that the h plus has come from this acidic environment.

00:50 So the name of this amino acid is cysteine.

00:54 This is cysteine.

00:56 How? cysteine contains sulfur.

01:00 There are two sulfur containing amino acids.

01:03 One is cysteine and other one is methionine.

01:09 Now the differences between the r groups.

01:13 R groups can be that is r groups of the amino acid can be hydrophobic.

01:20 Hydrophobic molecular, if we see the molecular characteristic hydrophobic indicates that the r group is non -polar as in case of the leucine, isoleucine etc.

01:39 That indicates it might be having aliphatic chain or even aromatic ring.

01:54 The second type could be hydrophilic that is water loving group.

02:01 These hydrophilic group molecular characteristic means that they are polar and example the functional groups that may be present in the r group are hydroxyl group, then we have the amino group and conh2 group etc.

02:27 These are the groups which define whether it is hydrophobic or hydrophilic amino acid.

02:39 Next the components of the molecular components of the nucleotide.

02:44 A nucleotide is basically made of two components nucleoside and phosphoric acid.

02:57 But the nucleoside indeed is made up of sugar and nitrogenous base...

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