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What is the difference between fehling and Benedict test?
Both Fehling's and Benedict's tests are used to detect the presence of reducing sugars in a solution, such as glucose. The key difference lies in the composition of the reagents: Fehling's solution is made up of separate A and B components that need to be mixed before testing, while Benedict's solution is a single solution containing the necessary components. Additionally, Fehling's solution is more sensitive than Benedict's solution.
What does Starch change into before respiratory ATP production?
Starch is broken down into glucose molecules before being further metabolized through glycolysis to produce ATP during cellular respiration.
Can you inject water and sugar into the human body?
If by "sugar" you mean D-glucose, then yes. That's exactly what a glucose drip is: an IV with a solution of D-glucose in water. Table sugar is not glucose but sucrose; generally sucrose is not injected alone (it's treated as waste and eliminated from the blood by the kidneys) but it is used in some intravenous medicines.
What process breaks down glucose before cellular respiration?
Glucose is broken down IN cellular respiration, also called the Kreb cycle. Glucose enters this electron transport chain process intact, and is broken down to CO2 and water, while giving off chemical energy which is stored in the form of ATP molecules for the cell to use for chemical energy in metabolic processes. Glucose is not broken down before cellular respiration; it is broken down IN the process.
Which of the choices below is not a source of glucose during the postabsorptive state?
Glycogen is not a direct source of glucose during the postabsorptive state, as it first needs to be broken down into glucose through glycogenolysis before it can be released into the bloodstream. Instead, gluconeogenesis from non-carbohydrate sources like amino acids, glycerol, and lactate primarily provides glucose during this state.
Is medicine in a bottle a suspension or a solution?
No, a syrup is a homogeneous solution. It is called a syrup as opposed to a solution if it contains sugar.
What type of egg white in a pavlova is solution suspension or collid?
BEFORE it is cooked, the egg white made for a pavlova is BOTH a solution (sugar is dissolved in it) and a colloid.
Purpose of adding NaOH to the mixture before taking the polarimeter reading?
Adding NaOH to the mixture before taking the polarimeter reading helps to neutralize any acidic impurities present in the sample, which could affect the accuracy of the polarimeter reading. This step ensures that the sample solution is free from any acidic interference, allowing for a more reliable optical rotation measurement.
Why do you have to wait 10 minutes after adding an enzyme before testing for glucose?
Waiting 10 minutes after adding an enzyme before testing for glucose allows sufficient time for the enzyme to catalyze the reaction and convert the substrate (such as starch) into glucose. This incubation period ensures that the enzymatic reaction reaches a measurable level of glucose, providing accurate results in the subsequent test. Additionally, it helps to stabilize the reaction conditions, minimizing variability in the measurements.
Why do we dip the leaf in water before adding the iodine solution?
Dipping the leaf in water before adding the iodine solution helps to soften the leaf tissue, making it easier for the iodine solution to penetrate and react with the starch present in the leaf. This process enhances the visibility of the starch by allowing the iodine solution to spread more evenly throughout the leaf.
Why is NaOH heated before adding BaCl2?
Heating NaOH before adding BaCl2 helps to dissolve NaOH completely in water, ensuring that no solid NaOH remains undissolved in the solution. This is important because the reaction between BaCl2 and NaOH requires the NaOH to be in solution to react with the BaCl2. Heating the solution can also speed up the reaction between NaOH and BaCl2.
What information would you need to know about a sample of air before you classify the sample as a solution suspension or a colloid?
the size of its largest particle
Why the NaOH solution is heated before adding BaCl2 in the two solutions method for determination of purity of NaOH sample?
Why the NaOH is heated before adding in BaCl2 for determination of purity of NaOH sample?
What is the difference solution dye and dope dyed?
Solution dyeing involves adding color to the fiber solution before it is extruded, resulting in a fully colored fiber. Dope dyeing involves adding color to the polymer dope (solution) before spinning, making the fiber colored throughout. Solution dyeing tends to offer more vibrant colors and greater colorfastness compared to dope dyeing.
Is liquid antibiotic a solution?
Not necessarily. It depends on the antibiotic and it distribution medium. If it requires shaking before use and is not transparent to light, it is a suspension and not a solution. An example would be Ampicillin (penicillin). An antibiotics that comes as a clear (maybe colored) liquids and does not require shaking before use probably is a solution.
Why must the sugar solution be cooled before adding yeast?
Cooling the sugar solution before adding yeast helps prevent the yeast from being killed by the high temperature. Yeast is a living organism that is sensitive to extreme temperatures, and adding it to a hot solution can potentially kill the yeast and hinder fermentation. Cooling the sugar solution to a suitable temperature ensures that the yeast can thrive and ferment the mixture properly.
Can you have water before a glucose tolerance test?
It is generally recommended to fast for 8-12 hours before a glucose tolerance test, so it is best to avoid consuming anything, including water, during this fasting period. Water may dilute the glucose solution and affect the accuracy of the test results.
