Biochemistry

Dialysis Tubing Experiment

Dialysis Tubing Experiment

Dialysis tubing is a cellulose material used to make model cells for experiments in osmosis and diffusion. These model cells do not use living cell membranes. A student made a model cell by pouring distilled water into some dialysis tubing. The stude

Anonymous   135   1 Reply

Anonymous

Xenobiotic metabolism: phase 1 reduction enzyme

Xenobiotic metabolism: phase 1 reduction enzyme

Phase biotransformation reactions can be oxidations, reductions or hydrolysis of the xenobiota molecule.
Phase 1 oxidations are catalyzed by the cytocrome P450 enzyme, abbreviated with the CYP acronym: the active site of this enzyme is a prorphy

Marco Atzori   217   1 Reply

Anonymous

An unknown amount of He gas occupies 30.5 L at 2.00 atm pressure and 300 K. What is the weight of ..

An unknown amount of He gas occupies 30.5 L at 2.00 atm pressure and 300 K. What is the weight of ..

An unknown amount of He gas occupies 30.5 L at 2.00 atm pressure and 300 K. What is the weight of the gas in the container?
 a. 2.48 g c. 9.91 g
  b. 4.95 g d. 19.8 g

Rot wow   196   1 Reply

Anonymous

To express Tat Protein in CD4 T cells without pre-activation

To express Tat Protein in CD4 T cells without pre-activation

Hello All
My experiment plan: To express Tat protein in CD4 T cell without pre-activation. I have tried different vectors and virus such as MND-AAV6 EGFP, CMV-AAV6 EGFP, AdRGD EGFP, SFFV-Lentivirus EGFP, MSCV-Lentivirus EGFP , HIV-VSV-G-Luc and

Harry Tian   175   N/A

Harry Tian

Which term is not used for a photosystem or a part of a photosystem?

Which term is not used for a photosystem or a part of a photosystem?

Which term is not used for a photosystem or a part of a photosystem?
A) PS I.
B) PS II.
C) Special pair.
D) Light complexes.
E) Antenna pigments.

mikael   828   1 Reply

bolbol

table sugar is placed into a negative control flask. Explain the effect this would have

table sugar is placed into a negative control flask. Explain the effect this would have

For this question, im a little confused as to what the effects would be on the other nutrients. For example, I think the sugar might reduce but I still think I'll need an explanation for the answer as I'm confused as to how it would effect

Krystal209   127   5 Replies

Krystal209

Can someone explain induction by IPTG And why DE3 is essential in induction?

Can someone explain induction by IPTG And why DE3 is essential in induction?

Can someone explain induction by IPTG

And why DE3 is essential in induction?

anatomy99   574   1 Reply

bolbol

In the following reaction, when 100. g of Br2 reacts, 111 g of AlBr3 is formed.2Al + 3Br2 2AlBr3

In the following reaction, when 100. g of Br2 reacts, 111 g of AlBr3 is formed.2Al + 3Br2 2AlBr3

In the following reaction, when 100. g of Br2 reacts, 111 g of AlBr3 is formed.
2Al + 3Br2 → 2AlBr3

▸ true

▸ false

steve751   916   2 Replies

Nikki Nikki

Reaction vs Mechanism Scheme, How do I write/start?

Reaction vs Mechanism Scheme, How do I write/start?

Reaction Scheme:
A) The first is the reaction of ethyl 4-aminobenzoate with hydrochloric acid.
B) The second is the reaction of ethyl 4-aminobenzoate with sodium hydroxide.

If no reaction occurs, write “NR” for the pro

Anonymous   109   1 Reply

Anonymous

PH balance and flavor.

PH balance and flavor.

I find seltzer water to be bitter. I have read carbon dioxide has no PH because it's a gas. What causes carbonated water to taste different from normal water?

CarbonRobot   183   5 Replies

bio_man

Decide if the equilibrium favors the starting materials or products

Decide if the equilibrium favors the starting materials or products

Decide if the equilibrium favors the starting materials or products. Highlight the side of each reaction favored at equilibrium.

[img width=350 height=248]https://biology-forums.com/gallery/45/1122469_12_09_22_11_57_06.jpeg[/

Anonymous   127   1 Reply

Anonymous

In mammalian tissue, serine can be a biosynthetic precursor for which amino acid?

In mammalian tissue, serine can be a biosynthetic precursor for which amino acid?

 

Daniel Chansa   197   1 Reply

duddy

Change of pH breakdown proteins to amino acids

Change of pH breakdown proteins to amino acids

Trypsin is an enzyme that catalyses the breakdown of proteins into amino acids. 9cm³ of liquid egg white (protein) was mixed with 1cm³ of 1% trypsin in a small beaker. The pH of the solution was measured using a pH probe for 30 minutes.
The pH

Anonymous   168   1 Reply

bio_man

Does the volume of substrate affect enzyme activity?

Does the volume of substrate affect enzyme activity?

I know that the substrate concentration affects enzyme activity, but does the volume of substrate affect enzyme activity?

For an example situation, beaker 1 has 5 enzymes and 10 substrate molecules in 10 mL. If the volume of substrate is i

i_love_science   267   2 Replies

Semantha Lorez

How much DMT does the brain produce?

How much DMT does the brain produce?

I have read that the brain can produce DMT from multiple parts, but at least as far as the pineal gland it can't make anywhere near enough to create a psychedelic trip. I am curious what the sum total might be, and if there is any evidence that

CarbonRobot   339   5 Replies

CarbonRobot

Which of the following is a solution?

Which of the following is a solution?

A. Blood plasma
B. Milk
C. Cigarette smoke
D. None of the above

Claire Lune   258   3 Replies

Semantha Lorez

Full list of human receptor sites???

Full list of human receptor sites???

Looking for a comprehensive list of receptor sites for human cells. All know receptor types for each and every one of the 200 odd cell types found in the human body. Much appreciated!

Nathan Niezgoda   356   3 Replies

Nathan Niezgoda

function of liver glycogen

function of liver glycogen

Is the function of liver glycogen different from that of muscle due to the lack of the enzyme glucose-6-phosphatase in the liver?

Steve8530   220   1 Reply

bio_man

“Most neuropsychological diseases of genetic origin are not associated with a dominant gene.” ...

“Most neuropsychological diseases of genetic origin are not associated with a dominant gene.” ...

“Most neuropsychological diseases of genetic origin are not associated with a dominant gene.”
Explain why this is so, and describe two situations in which there could be an exception to this general principle.

College Master   156   1 Reply

bio_man

The NADH reduced by the glycolytic pathway manages to donate its electrons to ETC through...

The NADH reduced by the glycolytic pathway manages to donate its electrons to ETC through...

Electron Transport Chain and Oxidative Phosphorylation

Maria Clara Alexandroni   174   1 Reply

bio_man

The synthesis of ATP occurs through the rotational catalysis of ____________.

The synthesis of ATP occurs through the rotational catalysis of ____________.

electron transport chain and oxidative phosphorylation.

Post Merge: 2 years ago

ATP-sintase

Maria Clara Alexandroni   167   1 Reply

bio_man

1 NADH generates more ATP than 1 FADH2 because the former pumps more H+ protons to the _______

1 NADH generates more ATP than 1 FADH2 because the former pumps more H+ protons to the _______

Electron transport chain and oxidative phosphorylation.

Maria Clara Alexandroni   132   1 Reply

bio_man

What are these ELISpot graphs called?

What are these ELISpot graphs called?

For example, the ELISpot graphs in the link below.
Is there a name for these types of graphs?

https://www.nature.com/articles/s41586-021-04186-8/figures/2

Also, I suppose the points are manually horizontally spaced so that

rasmasyean   146   1 Reply

bio_man

State the number of significant figures in each of the following measurements.6.1 10-5 mL

State the number of significant figures in each of the following measurements.6.1 10-5 mL

State the number of significant figures in each of the following measurements.


6.1 × 10-5 mL

Drew Kidd   146   2 Replies

bio_man

State the number of significant figures in each of the following measurements.0.0005 L

State the number of significant figures in each of the following measurements.0.0005 L

State the number of significant figures in each of the following measurements.


0.0005 L

benjaminl12998   181   2 Replies

bio_man

State the number of significant figures in each of the following measurements.75.00 m

State the number of significant figures in each of the following measurements.75.00 m

State the number of significant figures in each of the following measurements.


75.00 m

Guest   149   2 Replies

bio_man

How I can solve this exmple?

How I can solve this exmple?

Demonstrate the breaking of a triglyceride molecule.

a. On your diagram, circle and label the name of the breaking bond.

b. On your diagram, clearly label all functional groups present.

c. Name this type of reactio

Abdularhman   260   1 Reply

bio_man

How I can solve this exmple?

How I can solve this exmple?

 4. In an experiment, you drop a gummy bear (15% water) and a potato (45% water) into a beaker of
pure water. You allow the samples to sit for 24 hours. What will happen to both of the samples in
this experiment? Explain.

B) You

Abdularhman   192   1 Reply

bio_man

Phase separation and amino acids' roles

Phase separation and amino acids' roles

Hello Biology-forums community,

I'm currently studying the process of liquid-liquid phase separation as one of the proteins we study has been localized in membrane-less organelles.

I'm struggling to find a good explan

lolocola03   194   1 Reply

duddy

In plants, light energy channeled to PSII and PSI drives electron transport thro

In plants, light energy channeled to PSII and PSI drives electron transport thro

In plants, light energy channeled to PSII and PSI drives electron transport through a series of electron carriers. At the same time, protons are translocated into the ________.
A) stroma
B) lumen
C) granum
D) plasma membrane

mikael   997   1 Reply

bolbol

The source of electrons for green sulfur bacteria is ________, and the source of

The source of electrons for green sulfur bacteria is ________, and the source of

The source of electrons for green sulfur bacteria is ________, and the source of electrons for cyanobacteria is ________.
A) NADPH; NAD+
B) H2S; H2O
C) H2O; H2S
D) cytochrome c; cytochrome bf

mikael   536   1 Reply

bolbol

Converting enzyme activity to its amount

Converting enzyme activity to its amount

 Im working on a project in which I want to compare fermentation rate of Saccharomyces cerevisiae under different carbohydrates (glucose, sucrose and starch). Glucose and Sucrose aren't causing me any trouble, but when it comes to a starch, its

kszero   218   1 Reply

bio_man

Chlorophyll ______________ in short daylight allowing the colours of the accessory pigments to ...

Chlorophyll ______________ in short daylight allowing the colours of the accessory pigments to ...

Chlorophyll ______________ in short daylight allowing the colours of the accessory pigments to become visible in the fall

Abdulrahman Alhussami   467   1 Reply

bio_man

Which of the following statements concerning active transport is true?

Which of the following statements concerning active transport is true?

Which of the following statements concerning active transport is true?
 a. It takes place in the same direction as a concentration gradient.
  b. It requires no expenditure of energy by the cell.
  c. It can be compared to water runni

redheadprincess   172   2 Replies

LI YA

The glycosidic bond that connects the two monosaccharides in lactose is:

The glycosidic bond that connects the two monosaccharides in lactose is:

The glycosidic bond that connects the two monosaccharides in lactose is:
A) α(1→4)
B) β(1→4)
C) α(1→6)
D) α,β(1→2)

Neves   412   4 Replies

kadinw

If an enzymatic reaction has a Vmax of 30 mM/min and km of 50 mM/min

If an enzymatic reaction has a Vmax of 30 mM/min and km of 50 mM/min

If an enzymatic reaction has a Vmax of 30 mM/min and km of 50 mM/min when the substrate concentration is 25 mM, what is the velocity?

allu   580   2 Replies

Bello Opeyemi

A gas has a pressure of 540. torr when the temperature is 127 C. When the temperature changes to 27 ...

A gas has a pressure of 540. torr when the temperature is 127 C. When the temperature changes to 27 ...

A gas has a pressure of 540. torr when the temperature is 127 °C.  When the temperature changes to 27 °C, what is the new pressure, if there is no change in volume or amount of gas?

Kaito Momota   167   2 Replies

Elvis Ruiz

Calculate the [H3O+] and the pH of a 0.021 M HNO3 solution.

Calculate the [H3O+] and the pH of a 0.021 M HNO3 solution.

Calculate the [H3O+] and the pH of a 0.021 M HNO3 solution.
A) 4.8 × 10-13 M and 12.32
B) 4.8 × 10-13 M and -12.32
C) 0.021 M and 1.68
D) 0.021 M and -1.68

12

Neves   1598   16 Replies

Sreegayathri Annamraju

What is the mass of BaCl2 in a 0.250 L bottle of 0.200 M BaCl2?

What is the mass of BaCl2 in a 0.250 L bottle of 0.200 M BaCl2?

What is the mass of BaCl2 in a 0.250 L bottle of 0.200 M BaCl2?
 a. 5.21 g c. 41.7 g
  b. 10.4 g d. 52.1 g

Pooh bear   2221   8 Replies

gjg

Phosphoric acid, H3PO4, serves to buffer the intracellular fluid of cells at physiological pH ...

Phosphoric acid, H3PO4, serves to buffer the intracellular fluid of cells at physiological pH ...

Phosphoric acid, H3PO4, serves to buffer the intracellular fluid of cells at physiological pH because:
 a. it is a naturally occurring amino acid
  b. phosphate is only found in an organic form in biological molecules
  c. its pK2 lie

tarapratt95   943   6 Replies

Khenna Kheytiyel