Questions
Match each subtype of lipid listed on the right to all statements on the left that...

Match each subtype of lipid listed on the right to all statements on the left that are appropriate to the lipid subtype.

Question 12 options:

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the bi-layer that makes up the plasma membrane around a cell is considered a 'sea' of this type of lipid molecules

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the phospholipid, arachodonic acid, serves as the starting molecule that leads to the formation of members of this lipid subtype via the action of lipogenase and cyclooxygenase enzymes

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the main member of this lipid subtype in our bodies is a minor but important component in biological membranes like our plasma membranes because it makes those membranes fluid

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choleterol is the main member of this lipid subtype present in our bodies

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molecules from this lipid subtype act in paracrine fashion to influence blood clotting, produce pain and fever, regulate inflammation, etc.

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homrones like estrogen, progesterone, testosterone, vitamin D, cortisol, aldosterone, and DHEA - all made from cholesterol belong to this lipid subtype category

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these lipids constitute >90% of all the lipids we consume in our diets

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these lipids are metabolized by a process called beta oxidation to produce the bulk of the body's energy (i.e. it's ATP)

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these lipids are composed of a glycerol backbone to which 3 fatty acids are linked through ester bonds

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these lipids, like plain fatty acids - contain hydrocarbon carbon chains that have -COOH groups at one end and -CH3 groups at the other but unlike straight fatty acids, also contain cyclopentane rings in their centers

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these lipids contain glycerol backbones to which 2 fatty acids are attached by ester linkages to carbon 1 and carbon 2; at carbon 3 - an 'R' group is attached via a phosphate group

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the major member of this lipid subtype found in our bodies is cholesterol
1.

prostaglandins
2.

steroid lipids
3.

triglycerides
4.

phospholipids

In: Chemistry

Glycogen phosphorylase and the sodium-potassium pump both have amino acid residues that can be phosphorylated. In...

Glycogen phosphorylase and the sodium-potassium pump both have amino acid residues that can be phosphorylated. In the case of the sodium-potassium pump it is Asp369. In glycogen phosphorylase, it is Ser14 that gets phosphorylated. Compare and contrast the role of phosphorylation for both proteins with regards to how the proteins function.

In: Biology

Cyclohexanone on treatment with hydroxylamine gives P, which on treatment with sulphuric acid gives Q. When Q is heated with water at high temperature, R is obtained. Identify R. a) Nylon-6 b) Caprolactam c) Amino caproic acid d) Nylon-6,6

Cyclohexanone on treatment with hydroxylamine gives P, which on treatment with sulphuric acid gives Q. When Q is heated with water at high temperature, R is obtained. Identify R.

a) Nylon-6

b) Caprolactam

c) Amino caproic acid

d) Nylon-6,6

In: Chemistry

What is the pH of a solution that is 0.127 M sodium alaninate? (Sodium alaninate refers...

What is the pH of a solution that is 0.127 M sodium alaninate? (Sodium alaninate refers to “L-“, the fully deprotonated form of the amino acid alanine. What will be the equilibrium concentration of each of the three alanine species? pKa1 = 2.34 pKa2 = 9.69

pH: _________________
[H2L+]: ____________________ [HL]: _________________ [L-]: _________________

In: Chemistry

which of the following is not involved in the initiation of translation in bacteria a- mRNA...

which of the following is not involved in the initiation of translation in bacteria

a- mRNA

b- tRNA carrying N-formylmethionine that will occupy the P site

c- GTP and initiation factors

d- small and large ribosomal subunits

e- tRNA carrying the next amino acid that will occupy the A site

In: Biology

1. Explain what is meant by wobble in regard to translation   2. The following amino acid...

1. Explain what is meant by wobble in regard to translation  

2. The following amino acid sequence is found in a tripeptide: Met–Trp–His. Give all possible nucleotide sequences on the mRNA, on the template strand of DNA, and on the nontemplate strand of DNA that could encode this tripeptide.

In: Biology

So far we've learned about a few important cofactors involved with amino acid metabolism. What vitamin...

So far we've learned about a few important cofactors involved with amino acid metabolism. What vitamin is each cofactor also known as? What reactions are each required for? And what are the dietary implications of a deficiency in each cofactor?

  • Pyridoxal Phosphate
  • Tetrahydrofolate
  • Cobalmin

In: Biology

The pKa of the α-carboxyl group of phenylalanine is 1.83, and the pKa of its α-amino...

The pKa of the α-carboxyl group of phenylalanine is 1.83, and the pKa of its α-amino group is is 9.13.

Calculate the average net charge on phenylalanine if it is in a solution that has a pH of 8.00 (If the charge is positive, you do not need to enter a " +" sign.)

Please show your work.

In: Chemistry

EF-Tu... A. binds GTP and delivers amino-acyl tRNAs to the A site of the ribosome B....

EF-Tu...

A. binds GTP and delivers amino-acyl tRNAs to the A site of the ribosome

B. is hydrolyzed to allow release of initiation factors

C. binds GTP and allows ribosomal movement down the mRNA

D. allows base pairing between the mRNA and the 16s rRNA

In: Biology

Choose the amino acid in the following pairs that would be more likely to appear on...

Choose the amino acid in the following pairs that would be more likely to appear on the solvent-exposed surface of a protein and explain why you choose that answer.

a) Lys or Leu

b) Ser or Ala

c) Phe or Tyr

d) Trp or Gln

e) Asn or Ile

In: Biology