WorksheetsQuiz 4: Dietary Antioxidants
Total questions: 15
Worksheet time: 10mins
Regarding free radical, which of the following statements are correct?
Unreactive atoms or group of atoms
Molecules with an extra electron that stabilize cells
Unstable molecule that can damage cells by stealing electrons
Enzymes that repair damaged DNA
Which of the following statements about dietary antioxidants are correct?
Vitamin C and Vitamin E are examples of dietary antioxidants
Antioxidants work by accepting electrons to stabilise free radicals
Antioxidants are only found in supplements, not natural foods
All antioxidants are safe, even in high doses
Antioxidants donate electrons to neutralise free radicals and prevent cellular damage
True
False
Cell swelling due to failure of ion pumps a key feature of irreversible injury.
True
False
Which of the following statements about cellular injury and free radicals are TRUE?
Free radicals can damage lipids, proteins, and DNA
All free radicals are harmful and serve no beneficial role in the body
Lipid peroxidation is one mechanism by which free radicals harm cells
Oxidative stress is when antioxidants outnumber free radicals
Which of the following is a consequence of chronic inflammation?
Increased tissue repair and healing
Formation of scar tissue and fibrosis
Complete resolution of inflammation
Decreased immune system activity
What role do antioxidants play in reducing chronic inflammation?
Increased production of free radicals
Neutralise free radicals, preventing cellular damage
Promote release of inflammatory cytokines
Inhibit immune cell function
Which of the following statements are FALSE?
Polyphenol only act as antioxidants and do not influence inflammatory signalling pathways.
Malondialdehyde (MDA) is a harmful byproduct of oxidative stress that antioxidants help reduce
The NF-kB promotes inflammation, and antioxidants can inhibit this pathway to reduce inflammatory responses
Antioxidants play no role in promoting collagen synthesis or reducing fibrosis
Glutathione can help minimise tissue damage caused by ischemia-reperfusion injury
True
False
Oxidised (a) contributes to artherosclerosis by forming plaques in arteries, and antioxidants like Vitamin E help prevent this process.
Select all the TRUE statements.
Selenium and Vitamin E help reduce oxidative stress and inflammation in viral infections
Oxidised LDL contributes to artherosclerosis by forming plaques in the arteries, and antioxidants like Vitamin E help reduce LDL oxidation
Reactive oxygen species (ROS) play a beneficial role in all bacterial infections and contribute to tissue damage
All these statements are true
Chronic inflammation can produce (a) , which can lead to cellular damage and cancer.
Free radicals can damage DNA, proteins and lipids but antioxidants help prevent mutations and uncontrolled cell division.
True
False
How do Vitamin C and Vitamin E support the immune system in cancer prevention?
promoting mutations in DNA
enhancing the body’s ability to detect and destroy cancer
reducing chronic inflammation pathways
increasing oxidative stress
Which antioxidant-rich foods can support cancer prevention?
Local fruits like watermelon and banana
Processed foods high in preservatives
Overcooked vegetables
Whole foods balanced with vegetables and healthy proteins
