Biochem Flashcards
- Glycine reaction is normally mediated by?
- responsible for nitric oxide (NO) in vivo?
- Acetyl Coenzyme A
- Arginine
- normal sodium serum in human body
- Potassium
- 135-147 mEq/L
- 3.5-5 mEq/L
Folic acid has a tetrahydrofolate coenzyme activity based on what chemical structure?
-pteridine ring
What is correct regarding the formation of proteins?
A. Formed by condensation of peptide bond
B. Geometric sequence of amino acids
C. The formation occurs by complexation of a.a.
A
- 1st precursor of vit A
- strongest endogenous pain producer in human body?
- Carotene * Vitamin A is formed from retinoic acid that is formed from beta-carotene
- Bradykinin
Biological catalysts responsible for supporting almost all of the chemical
reactions that maintain human life process:
A. Nucleic acid
B. Amino acids
C. Carbohydrates
D. Oligopeptides
E. Enzymes
E- Enzymes are proteins, catalyst because they are never altered during a reaction III- Michaelis-Menten theory describe the enzymatic reactions
Correct statements regarding mutation may include:
I- Cell division
II- Change in genotype
III- Change in DNA replication altering the gene
II and III
Mutation is a permanent transmissible change in the genetic material, usually in a single gene.
Shaped network present in the cell between nucleus and cell wall:
Endoplasmic reticulum:
Rough-protein synthesis
Smooth-lipid syn. Does not have ribosome
The Michaelis-Menten equation-Enzymatic reactions will appears ZERO order when:
When Km approaches Vmax
Hydrolysis of fixed oils may yields:
Explain
Glycerol + Fatty acids
Bc fixed oils and fats are esters of glycerol and fatty acids
In an enzymatic reaction, addition of competitive inhibitor leads to:
A. Increase the rate of reaction
B. Decrease the rate of reaction
C. Same rate of reaction
D. Decrease rate and increase substrate concentration
E. Decrease both rate and substrate concentration
C. does not alter reaction rate
All of the following can cause denaturation of proteins, except? A) acids B) heating C) bases D) mechanical mixing E) Buffers
E. Denaturising agents include: heat, organic solvents, mechanical mixing, strong acids or base, detergents and ions of heavy metals such as lead or mercury.