Pregunta 1
Pregunta
What is the function of insulin?
Pregunta 2
Pregunta
One of the key properties of proteins are?
Respuesta
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Proteins are perpendicular polymers composed of amino acids
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proteins have a wide variety of functional groups
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Proteins can not interact with one another and other macromolecules to form complexes
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All proteins are rigid and flexible
Pregunta 3
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A primary structure is ?
Respuesta
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Chains of amino acids in a specific sequence
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Entire chains fold into well defined structures
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Amino acids close to one another within a sequence can fold into regular structures
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Composed of multiple polypeptide chains called subunits
Pregunta 4
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Alpha helix and beta strands are examples of secondary structures formed by adjacent alpha strands
Pregunta 5
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Globular proteins such as myoglobin is an example of primary, secondary, tertiary or quaternary structure?
Respuesta
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Primary
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Secondary
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Tertiary
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Quaternary
Pregunta 6
Pregunta
Hemoglobin is an example of a quaternary structure
Pregunta 7
Pregunta
What are the functions of enzymes?
Respuesta
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Degrades DNA
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Degrades RNA
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Catalyst
Pregunta 8
Pregunta
Myofibrils is an example of a protein
Pregunta 9
Pregunta
Four classes of amino acids are as followed: [blank_start]Hydrophobic[blank_end] amino acids, [blank_start]Polar[blank_end] amino acids, [blank_start]Positively[blank_end] charged amino acids, and [blank_start]Negatively[blank_end] charged amino acids
Respuesta
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Hydrophobic
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Polar
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Positively
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Negatively
Pregunta 10
Pregunta
What are the components of an amino acid?
Respuesta
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Carbon
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Nitrogen
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Carboxylic acid
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Amino group
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R group
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L group
Pregunta 11
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Only the R isomer is found in proteins
Pregunta 12
Pregunta
At neutral pH amino acids primarily exist in the [blank_start]zwitterions[blank_end] form
Pregunta 13
Pregunta
Which amino acid is a hydrophobic amino acid?
Respuesta
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Glycine
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Serine
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Arginine
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Aspartic Acid
Pregunta 14
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Positively charged amino acids are
Respuesta
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Histidine
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Tyrosine
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Leucine
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Arginine
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Isoleucine
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Lysine
Pregunta 15
Pregunta
Polar amino acids are
Respuesta
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Serine
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Valine
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Threonine
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Tyrosine
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Glutamine
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Cysteine
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Methionine
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Asparagine
Pregunta 16
Pregunta
Negatively charged amino acids consist of [blank_start]Aspartic[blank_end] acid and [blank_start]Glutamic[blank_end] Acid
Pregunta 17
Pregunta
Phenylalanine, Tryptophan, and Methionine are examples of what amino acid?
Respuesta
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Polar
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Positively charged
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Hydrophobic
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Negatively charged
Pregunta 18
Pregunta
Glycine, alanine, proline, valine and serine are examples of hydrophobic amino acids
Pregunta 19
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Peptide bonds are planar
Pregunta 20
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Amino acids are linked by
Pregunta 21
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Most proteins consist of [blank_start]50[blank_end] to [blank_start]2000[blank_end] amino acids
Pregunta 22
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Polypeptide chain can be cross-linked by sulfide bonds
Pregunta 23
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Secondary structure
Respuesta
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Polypeptide chains that fold into regular structures such as alpha helix, and beta sheet
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Hemoglobin
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Myoglobin
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Chains of amino acids in a specific sequence
Pregunta 24
Respuesta
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Coiled structures stabilized by intracain hydrogen bonds
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Stabilized by hydrogen bonds between polypeptide strands
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Not as rod like, fully extended not tightly coiled
Pregunta 25
Pregunta
Osteogenesis imperfecta
Respuesta
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Defect in collagen, Brittle bone disease occurs if a mutation results in the substitution of another amino acid in place of glycine
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lack of vitamin C preventing hydroxylation of collagen leading to abnormalities in collagen
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absence of vitamin K leading to proteins not being carboxylated
Pregunta 26
Pregunta
Tertiary structure
Respuesta
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Refers to spatial arrangement of amino acids that are far apart in the primary structure and to the pattern of disulfide bond formation
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Can be as simple as two identical polypeptide chains or as complex as dozens of different polypeptide chains
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Three-dimensional structure formed by hydrogen bonds between peptide NH and CO groups of amino acids that near one another in the primary structure
Pregunta 27
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Keratin and collagen are examples of fibrous proteins
Pregunta 28
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Myoglobin is found within your [blank_start]muscle[blank_end] and [blank_start]binds oxygen[blank_end] on your muscle
Pregunta 29
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Quaternary structure
Respuesta
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Hemoglobin
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Globular proteins
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Spatial arrangement of subunits and their nature of their interaction
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Spatial arrangement of amino acids that are far apart in the primary structure
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Structure assemble with other chains to form arrays such as the complex of six insulin molecules
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Myoglobin
Pregunta 30
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Hemoglobin is an example of tertiary structure?
Pregunta 31
Pregunta
Proteins can be denatured by any treatment that disrupts the weak bonds stabilizing tertiary structure such as
Pregunta 32
Pregunta
Scurvy is an example of a disease that results from dysfunctional protein modification and is due to?
Respuesta
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Lack of vitamin D which prevents hydroxylation of collagen
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Lack of vitamin C which prevents hydroxylation of collagen leading to abnormalities in collagen
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due to absence of vitamin K leading to clotting proteins not being carboxylated
Pregunta 33
Pregunta
Hemorrhaging is due to the absence of vitamin K
Pregunta 34
Pregunta
Amyloidoses plaques cause disease such as
Respuesta
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Alzheimer's
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Parkinson's
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Huntington's
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HIV
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Osteogenesis imperfecta
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Sickle cell
Pregunta 35
Pregunta
The function of a promoter is to initiate process or transcription