Biochemistry

a test tube contains albumin and pepsin the test for protein is positive why?

a test tube contains albumin and pepsin the test for protein is positive why?

I can't find the answer. Could someone please explain it.
Pepsin is an enzyme that breaks down a protein the test for peptides is negative why is that??

sml0920   9859   1 Reply

ilikelamp

Locate the H+ and OH- ions from the water molecule

Locate the H+ and OH- ions from the water molecule

locate the H+ and OH- ions from the water molecule that was split (hydrolyzed) in this reaction, showing esculin hydrolysis.

last problem on the attachment #4 not sure about this one..

[img width=350 height=132]https://biology-

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bronze   10858   20 Replies

Duong!

Calculate the pH at which a solution of cysteine would have no net charge.

Calculate the pH at which a solution of cysteine would have no net charge.

Calculate the pH at which a solution of cysteine would have no net charge.

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Hog95   10909   22 Replies

Biochemgirl24

Blood has a very narrow normal pH range but urine has a very broad normal pH ran

Blood has a very narrow normal pH range but urine has a very broad normal pH ran

Blood has a very narrow normal pH range but urine has a very broad normal pH range. What does that indicate about the physiology of pH?

nite_n_day   10917   5 Replies

dave65

The element sulfur has an atomic number of 16 and mass number of 32. How many ne

The element sulfur has an atomic number of 16 and mass number of 32. How many ne

The element sulfur has an atomic number of 16 and mass number of 32. How many neutrons are in the nucleus of a sulfur atom? If sulfur forms covalent bonds with hydrogen, how many hydrogen atoms can bond to one sulfur atom?

nite_n_day   10944   2 Replies

nite_n_day

How does a cell vary the amount of enzyme present?

How does a cell vary the amount of enzyme present?

I know that cells don't synthesise many enzymes, so how do they control the amount of enzyme present?

zaq zaq   10977   2 Replies

riza

Factors that affect K

Factors that affect K

For a hypothetical mouse population, determine whether the actions described will increase K , decrease K , or not affect K.

This is what I got:

K increase:
a main competitor for food is eliminated, increasing food availab

tatda   11221   8 Replies

barry

what is the functional group that links two monosaccharides in a disaccharide?

what is the functional group that links two monosaccharides in a disaccharide?

would that be the same kind of functional group linking monosaccharides in long-chain polysaccharides like amylose?

riveraj22   11610   3 Replies

Laser_3

What functional groups are found in 1.Proteins 2. Carbohydrates 3.Lipids 4.Nucle

What functional groups are found in 1.Proteins 2. Carbohydrates 3.Lipids 4.Nucle

What functional groups are found in 1.Proteins 2. Carbohydrates 3.Lipids 4.Nucleic acids?
I need to be able to determine what structual diagram will be a protein, carb, lipid and nucleic acid..

gundem   11681   4 Replies

weifang

emulsion PCR

emulsion PCR

Hello! Does anyone know how emulsion PCR (or emPCR) works, and what is it used for? I think it is performed after pyrosequencing, but I don't know why- woulndn't regular PCR do the same? This PCR type doesn't seem to have much written

lrob   13526   1 Reply

bio_man

Negative supercoiling

Negative supercoiling

...which of these are correct?

Negative supercoiled DNA has more helical turns than relaxed DNA.
Negative supercoiling occurs as a result of the underwinding of circular or protein-bound DNA.
Negative and positive supercoiling gi

jamie33   13649   12 Replies

duddy

oxidation/reduction

oxidation/reduction

1) Use the following data?
1. Cu3+ + 2e- -> Cu+ E1=1.28 V
2. Cu2+ + e- -> Cu+ E2= 0.15V
3. Cu2+ + 2e- -> Cu E3= 0.34 V
4. Cu+ + e- -> Cu E4= 0.52 V

Calculate the standard reduction potential for the reaction

chels194   13691   6 Replies

bio_man

What are intercellular junctions and why are they important?

What are intercellular junctions and why are they important?

What are intercellular junctions and why are they important? also

Contrast plasmodesmata, tight junctions, desmosomes, and gap junctions.

thanks!~

Morbesety   14609   1 Reply

bio_man

What is the net ionic equation for the hydrolysis of KAI(SO4)2?

What is the net ionic equation for the hydrolysis of KAI(SO4)2?

What is the net ionic equation for the hydrolysis of KAI(SO4)2

What is the expression for equilibrium constant?
What is the value

microRN   14770   1 Reply

firemonkey

What is a permissive hormone effect?

What is a permissive hormone effect?

What is a permissive hormone effect? Provide an example, explaining what would result if the permissive hormone was absent.

ppk   17252   1 Reply

bio_man

Oligosaccharide attachement point

Oligosaccharide attachement point

Can anyone help me with this please. I have no idea what a oliogo attachement point is. :/

chels194   17322   4 Replies

chels194

what is the difference between glucose and fructose structures?

what is the difference between glucose and fructose structures?

what is the difference between glucose and fructose structures?

toku   17423   5 Replies

ijclement

Hemoglobin Oxygen Binding Curve Question

Hemoglobin Oxygen Binding Curve Question

From the link:

For the following questions, which would it be?

-from A to B
-B to A
-B to C
-C to B

1) the blood pH drops from 7.4 to 7.2
2) The blood CO2 concentration increases
3) THe conce

chels194   17526   10 Replies

chels194

What is the substrate of pepsin?

What is the substrate of pepsin?

and what does pepsin do to its substrate?

buddhadog   17753   1 Reply

smithstevee

functional groups

functional groups

In the following table, indicate whether each functional group is polar or nonpolar and hydrophobic or hydrophilic. Which of these functional groups are found in proteins and lipids?

Functional Group

OH

- CH2

levik24   19256   1 Reply

bio_man

Oxidative phosphorylation

Oxidative phosphorylation

 Which of these are true? regarding how hydrogen ion concentration relates to energy production in oxidative phosphorylation.

1) ATP synthase provides energy in the form of ATP to actively transport H+ into the mitochondrial matrix.

alatq33   19272   5 Replies

bio_man

DNS (metabolic biochemistry lab)

DNS (metabolic biochemistry lab)

Can you give me a link on how DNS works... how it gives color to the solution,  why we heat the solution after adding it.. and how does it stop the occuring reaction ? .. i looked on the internet and i couldn't find a website that explains

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karim89   19778   15 Replies

jack

What are the approx. C:H:O ratios of lipids protiens and nucleic acids?

What are the approx. C:H:O ratios of lipids protiens and nucleic acids?

I know that the ratio for Carbohydrates is 1:2:1, but the others seem to be too different to come up with a set ratio. And which compounds can be identified by the ratios alone?

AllyKat96   20398   4 Replies

bokuto

Complete the following reaction for the proteolytic cleavage

Complete the following reaction for the proteolytic cleavage

The activation of chymotrypsinogen, a zymogen, requires the cleavage of a bond between Arg-15 and Ile-16, and the subsequent attraction of Ile-16 and Asp-194. Complete parts (a) and (b). a) Complete the following reaction for the proteolytic cleavage

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locklearl   23483   39 Replies

TacoSauce71

EXERCISE 3: Neurophysiology of Nerve Impulses

EXERCISE 3: Neurophysiology of Nerve Impulses

Does anyone have the answers to Anatomy & Physiology Lab 3

ACTIVITY 1:  The Resting Membrane Potential
1.   The nervous system contains two general types of cells: neuroglia cells and
a.   nerves.
b.   cell bodies.            

mattiewal   23604   11 Replies

fafajung

How to calculate the # of ATPs

How to calculate the # of ATPs

How do you calculate the # of ATPs for a C16?
I know there's an equation but somehow when I'm calculating it, I'm not getting the right answer.

This is what I did:
C16-even C# so (n/2)=5 acetyl -SCoA
  &n

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alatq33   32098   14 Replies

duddy

What is the CORRECT hydrolysis equation for the salt, NH4Cl?

What is the CORRECT hydrolysis equation for the salt, NH4Cl?

I looked for this answer online and I keep coming across conflicting equations:
I want to know the equation showing the dissociation of NH4Cl in water.

I would also like to know what the hydrolysis equation for the ion dissociated in water would be

lethalheritage   35693   3 Replies

Scottyjay