Select all traits listed below that are shared between prokaryotic Archaea and eukaryotes, but NOT between Archaea and Bacteria.
| A. |
The genomic DNA is surrounded by a membrane. |
|
| B. |
Flagella have a similar structure and locomotion mechanism. |
|
| C. |
Chromosomes are wrapped around histone proteins. |
|
| D. |
Similar enzymes and machinery are used to transcribe and translate RNA. |
|
| E. |
Cell membranes contain straight-chain fatty acids with ester linkages to glycerol. |
In: Biology
5. A primary standard is a reagent that is extremely pure, stable, has no waters of hydration, and has a high molecular weight. One such standard commonly known as TRIS or THAM is tris(hydroxymethyl) amino methane, (CH2OH)3 CNH2. How many grams of salt will be required to titrate 25.0 mL of 0.10 M HCL solution?
(CH2OH)3 CNH2 (aq) + HCL (aq) ---> (CH2OH)3 CNH3^+CL^-(aq)
In: Chemistry
For biochemistry, it asks "At what optimal pH can you separate an amino acid mixture of lysine, arginine, and cysteine" and the answer is 9.5
Then it asks for the net charge of arginine at the chosen pH. The answer came out as 0.24, which I have no idea how it got there. My question is how do you do this? This is the info i have:
pKa of COOH = 2.2
pKa of NH3+ = 9.0
pKa of R group = 12.5
In: Chemistry
1. If a cell cannot properly create DNA polymerase which step of replication would this cell be incapable of performing? Explain why
2. It is possible to compare transcription to a race car moving
along a track. In transcription which units or structures would be
analogous to the following: the car, a green light, the track, and
a stop sign?
3. Describe the relationship between the sequence of the mRNA molecule and the amino acid sequence of the resulting protein.
In: Biology
A newly synthesized protein generally folds up into a
__________________ conformation. All the information required to
determine a protein’s conformation is contained in its amino acid
__________________. On being heated, a protein molecule will become
__________________ as a result of breakage of __________________
bonds. On removal of urea, an unfolded protein can become
__________________. The final folded conformation adopted by a
protein is that of __________________ energy.
Words: denatured composition noncovalent irreversible stable reversible highest covalent renatured lowest unstable sequence
In: Chemistry
Gluconeogenesis
1. As part of the metabolic pathway for amino acid degradation, malate not oxalacetate is transported into the cytoplasm form the mitochondrion. Why malate?
2. Explain how carbon dioxide serves to couple ATP hydrolysis into the energetics of the synthesis of PEP to pyruvate? Provide both mechanism and energetics.
These two questions are from a study guide and I'm struggling finding the answers in my notes and text book, thank you for your help!
In: Biology
2. How many ATP molecules are needed to give 22 kcal of energy?
How much energy is given by 7.5 moles of ATP?
5. How many ATP will be produced if maltose is degraded and it
undergoes glycolytic pathway only?
6. How many ATP will be produced if maltose is completely oxidized
through cellular respiration?
7. How many ATP will be produced if the amino acid leucine will be
used as a metabolite in the krebs cycle?
In: Nursing
You just ate a huge Brownie Delight from Diary Castle. Instead
of working out like you had planned,
you end up sitting on the couch watching House of Cards and Agents
of Shield. In your liver, what is
going to happen to the fat pathways? How does this affect the
citric acid cycle? How does this
ultimately affect oxidative phosphorylation? What happens to your
amino acid pathways?
In: Biology
1. Determine the molarity of a KOH solution when each of the following amounts of acid neutralizes 25.0mL of the KOH solution.
5.00mL of 0.500 M H2SO4
20.00 mL of 0.250 M HNO3
13.07mL of 0.100 M H3PO4
10.00mL of 1.00 mL of 1.00 M HCl.
2 How many mEq of HCO3- are present in a solution that also contains 75 mEq of Na+, 83mEq K+, 35 mEq HCO3-, 153 mEq Cl-.
3 .What is the PH of a buffer that is 0.230 M in a weak acid and 0.500M in the acid’s conjugate base? The pka for the acid is 6.72.
4. Calculate the pKa value for each of the following acids
Nitrous acid Ka = 4.5 *10-4
Carbonic acid, Ka = 4.3 * 107
Dihydrogen phosphate ion, Ka =6.2 * 10-8
Sulfurous acid, Ka = 1.5 *10-2
5. The HCL in a 1.10 M HCI solution is 100% dissociated. What are the molar concentrations of HCI, H3O+ and Cl- in the solution.
6.What is the PH of a buffer that is 0.150 M in a weak acid and 0.150M in the acid’s conjugates base? The acids ionization constant is 6.8 * 10-6
In: Chemistry
All early civilizations – i.e. prehistoric, Near Eastern, Egyptian, Aegean, Greek, and Roman – attempted to represent the human figure within their art. Within this essay, provide a comprehensive analysis of the similarities and differences in the representation of the human form in these early depictions. Address not only the artistic portrayal of the human body, but also how these art forms were significant within the culture in which they were created. Provide specific artwork examples (including identifying data, such as titles or source references) throughout your essay
In: Nursing