Final Exam Flashcards
Vitamin __ is also called niacin:
A. B1
B. B2
C. B3
D. B4
E. B12
C. B3
Which of the following about competitive inhibition is true:
A. Vmax is decreased
B. The structure of the inhibitor resembles one of the substrate
C. In a Lineweaver-Burke plot the lines of the uninhibited enzyme assay intersects with the line of the inhibited enzyme assays on the x-axis
D. Km of the substrate is decreased
E. It is nonreversible
B. The structure of the inhibitor resembles the one of the substrate
Assign the compounds to the correct classes of compounds:
A. Lipids
B. Proteins
C. Nucleotides.
D. Carbohydrates
Vitamin E
ADP
Arachidonic Acid
Hexose Kinase
Amylose
Erythrulose
-Vitamin E: A (Lipid)
-ADP: C (Nucleotide)
-Arachidonic Acid: A (Lipid)
-Hexose Kinase: B (Protein)
-Amylose: D (Carbohydrate)
-Erythulose (Carbohydrate)
A membrane-spanning alpha-helix consists mainly of:
A. Non polar amino acids
B. Positively charged (basic) amino acids
C. Negatively charged (acidic) amino acids
D. Aromatic amino acids
E. Modified amino acids
A. Non polar amino acids
A diet deficient in ________ leads to hair and tooth loss:
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin E
E. Vitamin K
B. Vitamin D
Match the compounds with the following names or descriptions:
A. Pro inflammatory nutrient
B. Cholecalciferol
C. Compound involved in energy storage.
D. Membrane lipid.
E. Proteins that bind to oligosaccharides with high specificity and affinity
F. Anti inflammatory nutrient
Glycogen
Vitamin B
Cholesterol
Lectins
Linoleic Acid
Eicosapentanenoic acid (EPA)
-Glycogen: C (Energy Storage)
-Vitamin D: B (Cholecalciferol)
-Cholesterol: D (Membrane Lipid)
-Lectins: E (Bind to Oligosaccharides)
-Linoleic Acid: A (Pro-inflammatory nutrient)
-Eicosapentanenoic acid (EPA) (Anti-inflammatory nutrient)
Which is the correct order between most reduced (left) and most oxidized (right)?
A. Carboxyl-Carbonyl-Hydroxyl-Saturated Hydrocarbon
B. Saturated Hydrocarbon-Hydroxyl-Carbonyl-Carboxyl
C. Saturated Hydrocarbon-Carbonyl-Hydroxyl-Carboxyl
D. Hydroxyl-Carbonyl-Carboxyl-Saturated Hydrocarbon
E. Hydroxyl-Carbonyl-Saturated Hydrocarbon-Carboxyl
B. Saturated hydrocarbon-hydroxyl-carbonyl-carboxyl
Active transport across a membrane is:
A. The definition of transport via a membrane protein (as opposed to simple diffusion)
B. The movement of a solute along a concentration gradient
C. The movement of a solute against a concentration gradient
D. Transport that generates energy
C. The movement of a solute against a concentration gradient
The pH of a solution of 100mM NaOH is ____:
A. 14
B. 13.9
C. 13
D. 10
E. 1
C.13
The deficiency of vitamin ___ causes Pellagra (“the 4 D’s):
A. B1
B. B2
C. B3
D. B5
E. B6
C. B3
______ are universal electron carriers in biological systems:
A. Vitamins
B. NAD+ and FAD
C. Lipids
D. Carbohydrates
E. ATP and GTP
B. NAD+ and FAD
Which of the following statements about buffers is true:
A. At pH values lower than the pK, the conjugate base concentration is higher than that of the acid
B. The pH of a buffered solution remains constant no matter how much acid or base is added to the solution
C. The strongest buffers are those composed of strong acids and strong bases
D. When pH = pKa, the weak acid and conjugate base concentration in a buffer is equal
E. A buffer composed of a weak acid of pK = 5.0 is stronger at pH 4 than at pH 6
D. When pH=pKa, the weak acid and conjugate base concentration in a buffer is equal
In DNA, the following bases pair on complimentary strands:
A. A with G and U with C
B. A with C and G with T
C. A with T and G with C
D. A with U and G with C
E. A with G and T with C
C. A with T and G with C
The pI (isoelectirc pH; no overall charge) of phenylalanine _____ (pK1= 1.83, pK2 = 9.13):
A. 1.83
B. 5.48
C. 7.30
D. 9.13
E. 10.96
B. 5.48
(1.83 + 9.13 / 2)
The sum of all biochemical reactions in a cell is called __________:
A. Cellular respiration
B. Metabolism
C. Catabolism
D. Anabolism
E. Bioenergetics
B. Metabolism
_________ is important for blood clotting:
A. Vitamin A
B. Vitamin B1
C. Vitamin C
D. Vitamin D
E. Vitamin K
E. Vitamin K
(Klotting)
The phospholipid composition of biological membranes:
A. Is universally the same in all organisms
B. Is random and of no importance
C. Is always the same in the two monolayers (like mirror image)
D. Varies with tissue, organism, inner and outer monolayers, even age of a cell
E. There are no phospholipids in biological membranes
D. Varies with tissue, organism, inner and outer monolayers, even age of a cell
Rickets is caused by ____________:
A. A point mutation
B. A frame shift mutation
C. Vitamin D deficiency
D. Vitamin K deficiency
E. A diet low in omega-3 fatty acid
C. Vitamin D deficiency
Translation occurs in the _________:
A. Cytoplasm
B. Extracellular space
C. Golgi apparatus
D. Nucleus
E. Mitochondria
A. Cytoplasm
Thiamin is also called vitamin ______
A. B1
B. B2
C. B3
D. B5
E. B6
A. B1
The synthesis of Nucleic acids:
A. Always proceeds from the C-terminus
B. Always proceeds from the 3’ to the 5’ end
C. Always proceeds from the 5’ to the 3’ end
D. Can proceed either from the 3’ to the 5’ end or from the 5’ to the 3’ end
E. Always proceeds from the N-terminus
C. Always proceeds from the 5’ end to the 3’ end
Pathogenic acid is essential for the biosynthesis of ________:
A. NAD+
B. FAD
C. ATP
D. CoA
E. Collagen
D. CoA
The enzyme that catalyzes the polymerization of amino acids is called _________:
A. DNA polymerase
B. Ribosome
C. RNA polymerase
D. Ribonucleose
E. TRNA
B. Ribosome
Gene expression refers to the process that:
A. Converts a certain sequence of bases in DNA into a specific sequence of amino acids
B. Is used to synthesize the lagging strand in DNA synthesis
C. Removes introns
D. Leads to the assembly of the two subunits of ribosomes when mRNA is processed
A. Converts a certain sequence of bases in DNA into a specific sequence of amino acids