Questão 1
Questão
What is the function of insulin?
Questão 2
Questão
One of the key properties of proteins are?
Responda
-
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
Questão 3
Questão
A primary structure is ?
Responda
-
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
Questão 4
Questão
Alpha helix and beta strands are examples of secondary structures formed by adjacent alpha strands
Questão 5
Questão
Globular proteins such as myoglobin is an example of primary, secondary, tertiary or quaternary structure?
Responda
-
Primary
-
Secondary
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Tertiary
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Quaternary
Questão 6
Questão
Hemoglobin is an example of a quaternary structure
Questão 7
Questão
What are the functions of enzymes?
Responda
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Degrades DNA
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Degrades RNA
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Catalyst
Questão 8
Questão
Myofibrils is an example of a protein
Questão 9
Questão
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
Responda
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Hydrophobic
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Polar
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Positively
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Negatively
Questão 10
Questão
What are the components of an amino acid?
Responda
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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
Questão 11
Questão
Only the R isomer is found in proteins
Questão 12
Questão
At neutral pH amino acids primarily exist in the [blank_start]zwitterions[blank_end] form
Questão 13
Questão
Which amino acid is a hydrophobic amino acid?
Responda
-
Glycine
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Serine
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Arginine
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Aspartic Acid
Questão 14
Questão
Positively charged amino acids are
Responda
-
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
Questão 15
Questão
Polar amino acids are
Responda
-
Serine
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Valine
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Threonine
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Tyrosine
-
Glutamine
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Cysteine
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Methionine
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Asparagine
Questão 16
Questão
Negatively charged amino acids consist of [blank_start]Aspartic[blank_end] acid and [blank_start]Glutamic[blank_end] Acid
Questão 17
Questão
Phenylalanine, Tryptophan, and Methionine are examples of what amino acid?
Responda
-
Polar
-
Positively charged
-
Hydrophobic
-
Negatively charged
Questão 18
Questão
Glycine, alanine, proline, valine and serine are examples of hydrophobic amino acids
Questão 19
Questão
Peptide bonds are planar
Questão 20
Questão
Amino acids are linked by
Questão 21
Questão
Most proteins consist of [blank_start]50[blank_end] to [blank_start]2000[blank_end] amino acids
Questão 22
Questão
Polypeptide chain can be cross-linked by sulfide bonds
Questão 23
Questão
Secondary structure
Responda
-
Polypeptide chains that fold into regular structures such as alpha helix, and beta sheet
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Hemoglobin
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Myoglobin
-
Chains of amino acids in a specific sequence
Questão 24
Responda
-
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
Questão 25
Questão
Osteogenesis imperfecta
Responda
-
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
Questão 26
Questão
Tertiary structure
Responda
-
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
Questão 27
Questão
Keratin and collagen are examples of fibrous proteins
Questão 28
Questão
Myoglobin is found within your [blank_start]muscle[blank_end] and [blank_start]binds oxygen[blank_end] on your muscle
Questão 29
Questão
Quaternary structure
Responda
-
Hemoglobin
-
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
Questão 30
Questão
Hemoglobin is an example of tertiary structure?
Questão 31
Questão
Proteins can be denatured by any treatment that disrupts the weak bonds stabilizing tertiary structure such as
Questão 32
Questão
Scurvy is an example of a disease that results from dysfunctional protein modification and is due to?
Responda
-
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
Questão 33
Questão
Hemorrhaging is due to the absence of vitamin K
Questão 34
Questão
Amyloidoses plaques cause disease such as
Responda
-
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
Questão 35
Questão
The function of a promoter is to initiate process or transcription