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WorksheetsQuiz on Protein Structure and Urea Cycle
Total questions: 20
Worksheet time: 10mins
Which of the following defines a protein?
A polymer of glucose
A polymer of amino acids
A type of lipid
A nucleic acid
The primary structure of protein is maintained by which bond?
Hydrogen bond
Peptide bond
Disulfide bond
Ionic bond
The secondary structure of protein includes:
Beta sheets only
Alpha helices only
Alpha helices and beta sheets
Triple helix
The bond responsible for alpha helix structure is:
Peptide bond
Disulfide bond
Hydrogen bond
Ionic bond
Tertiary structure is stabilized by all EXCEPT:
Hydrophobic interactions
Disulfide bonds
Hydrogen bonds
Phosphodiester bonds
An example of quaternary protein structure is:
Myoglobin
Insulin
Albumin
Hemoglobin
Protein denaturation affects which level of structure?
Primary only
Primary and secondary
Secondary and tertiary
Tertiary and quaternary
Denaturation of proteins leads to:
Loss of primary structure
Peptide bond cleavage
Loss of function and solubility
Increased enzymatic activity
Which of the following enzymes catalyzes the first step of urea cycle?
Arginase
Carbamoyl phosphate synthetase I
Argininosuccinate lyase
Ornithine transcarbamylase
Where does the urea cycle occur?
Cytoplasm only
Mitochondria only
Cytoplasm and mitochondria
Nucleus
The main function of the urea cycle is:
Energy production
Protein synthesis
Urea formation
Ammonia absorption
How many ATPs are used in urea cycle?
2
3
4
5
Which step of urea cycle produces fumarate?
Argininosuccinate synthase
Argininosuccinate lyase
Arginase
Ornithine transcarbamylase
CPS I is located in:
Cytoplasm
Mitochondria
Endoplasmic reticulum
Golgi apparatus
CPS II differs from CPS I by being involved in:
Protein metabolism
Urea cycle
Pyrimidine synthesis
Fatty acid oxidation
CPS I uses which of the following as a nitrogen donor?
Glutamine
Aspartate
NH3 (Ammonia)
Alanine
Which is NOT a disorder of the urea cycle?
Ornithine transcarbamylase deficiency
Argininosuccinic aciduria
Phenylketonuria
Citrullinemia
Hyperammonemia is a feature of:
Protein deficiency
Urea cycle defect
Diabetes
Hyperthyroidism
In the urea cycle, arginase acts on which substrate?
Citrulline
Arginine
Ornithine
Carbamoyl phosphate
Which is a product of the final step of urea cycle?
Uric acid
Creatinine
Ammonia
Urea
