Difficulty: Mixed
What is a major role of dietary protein?
A Provides dietary fibre
B Supplies amino acids
C Replaces all water
D Makes minerals unnecessary
Answer: B. Supplies amino acids Amino acids from protein support tissues and many body functions.
What are amino acids in a protein?
A Its stored vitamins
B Its fatty acids
C Its sugar molecules
D Its building blocks
Answer: D. Its building blocks Proteins are chains of amino acids.
Why are some amino acids called essential?
A Food must supply them
B Muscles store them forever
C They contain no nitrogen
D They occur only in plants
Answer: A. Food must supply them Essential amino acids must come from food because the body cannot make enough.
What does a complete protein source provide?
A Only one amino acid
B No nitrogen compounds
C All essential amino acids
D Dietary fibre alone
Answer: C. All essential amino acids A complete protein provides all essential amino acids in adequate amounts.
Which food is a useful plant protein source?
A Lentils
B Fruit juice
C Cooking oil
D Table sugar
Answer: A. Lentils Lentils and other pulses contribute plant protein.
Which food is made from soybeans and provides protein?
A Jam
B Olive oil
C Tofu
D Soda
Answer: C. Tofu Tofu is made from soybeans and provides protein.
Which choice is an animal-source protein food?
A Rice syrup
B Apple juice
C Coconut oil
D Eggs
Answer: D. Eggs Eggs provide protein along with other nutrients.
Where can vegetarians obtain protein?
A Only from meat
B Pulses, nuts, and dairy
C Only from fish
D Only from supplements
Answer: B. Pulses, nuts, and dairy Many vegetarian foods, including pulses, nuts, seeds, dairy, and soy, provide protein.
Must plant proteins be combined at every meal?
A Yes, in every bite
B Only with added sugar
C No, variety across the day
D Only with meat
Answer: C. No, variety across the day A varied pattern across the day can supply essential amino acids without combining foods at every meal.
What happens to protein during digestion?
A Broken into amino acids
B It becomes dietary fibre
C It turns into minerals
D It remains intact forever
Answer: A. Broken into amino acids Digestive enzymes break proteins into smaller peptides and amino acids.
Which body molecules can use amino acids as building materials?
A Dietary fibre only
B Enzymes and some hormones
C Water and oxygen
D Essential fatty acids
Answer: B. Enzymes and some hormones Amino acids help form enzymes and many signalling molecules.
How does protein support tissue maintenance?
A It removes all body fat
B It replaces sleep
C It prevents every illness
D It supplies repair materials
Answer: D. It supplies repair materials Protein provides amino acids used in building and maintaining tissues.
Which immune molecules are made partly from proteins?
A Dietary sugars
B Bile salts only
C Mineral crystals
D Antibodies
Answer: D. Antibodies Antibodies are proteins that help the immune system recognize targets.
What protein carries oxygen in red blood cells?
A Collagen
B Hemoglobin
C Insulin
D Keratin
Answer: B. Hemoglobin Hemoglobin is a protein that binds and transports oxygen in blood.
Which proteins help muscles contract?
A Insulin and glucagon
B Keratin and collagen
C Actin and myosin
D Albumin and fibrinogen
Answer: C. Actin and myosin Actin and myosin interact to produce muscle contraction.
What protein is a major structural component of connective tissue?
A Collagen
B Amylase
C Hemoglobin
D Insulin
Answer: A. Collagen Collagen is a structural protein found in connective tissues.
Why do protein requirements vary between people?
A Age, health, and growth differ
B Everyone has identical needs
C Food color sets requirements
D Protein is never required
Answer: A. Age, health, and growth differ Needs depend on factors such as age, growth, activity, and health.
Who may benefit from individualized protein advice?
A Every healthy adult equally
B Only people avoiding fruit
C Anyone reading a label
D Someone with kidney disease
Answer: D. Someone with kidney disease Kidney conditions can affect dietary needs, so advice should be individualized by a clinician.
What does protein quality broadly describe?
A Food package design
B Amino acid profile and digestibility
C Cooking time alone
D Number of ingredients
Answer: B. Amino acid profile and digestibility Protein quality relates to amino acid composition and how well protein is digested and used.
How much energy does protein provide in standard estimates?
A About one kcal per gram
B About seven kcal per gram
C About four kcal per gram
D About nine kcal per gram
Answer: C. About four kcal per gram Protein is commonly estimated to provide about four kilocalories per gram.
Do most people need protein powder to meet protein needs?
A Yes, every day
B Only at breakfast
C Not necessarily from supplements
D Only after exercise
Answer: C. Not necessarily from supplements Many people can meet needs through food; supplements are not universally necessary.
What is a sensible step before using protein supplements?
A Take the largest scoop
B Review needs and safety
C Replace balanced meals
D Ignore medical conditions
Answer: B. Review needs and safety A qualified professional can consider diet, health, and supplement risks.
Why should people with chronic conditions check supplements first?
A Ingredients can affect health
B Powders contain no ingredients
C Protein has no body effects
D Labels are always complete
Answer: A. Ingredients can affect health Medical conditions and medicines can change whether a supplement is appropriate.
What helps build muscle along with adequate protein?
A Skipping all meals
B Avoiding carbohydrates entirely
C Taking more powder only
D Progressive resistance exercise
Answer: D. Progressive resistance exercise Muscle growth depends on training and adequate overall nutrition, not protein alone.
Must protein be eaten immediately after every workout?
A Yes, within one minute
B No, total diet matters
C Only before exercise
D No, muscles use no protein
Answer: B. No, total diet matters Daily intake and training matter; a strict minute-by-minute rule is not necessary for everyone.
Which meal can provide protein in a vegetarian pattern?
A Dal with curd
B Fruit juice alone
C Plain sugar syrup
D Black tea only
Answer: A. Dal with curd Dal and curd provide complementary sources of dietary protein.
What helps make plant-based protein choices more varied?
A Eat only one bean
B Avoid all seeds
C Choose sweet drinks
D Rotate pulses, nuts, and soy
Answer: D. Rotate pulses, nuts, and soy Variety across plant protein foods broadens nutrient sources.
Which food provides protein along with healthy fats?
A Sugar candy
B Fruit cordial
C Peanuts
D Salted water
Answer: C. Peanuts Peanuts contain protein and mostly unsaturated fats.
Does cooking usually erase all protein from food?
A Yes, protein disappears
B Only boiling makes protein
C Heat changes it to fibre
D No, protein remains present
Answer: D. No, protein remains present Cooking can change protein structure, but it does not make the protein vanish.
What does denaturation mean for a protein?
A It becomes a vitamin
B It turns into water
C Its structure changes
D Its amino acids vanish
Answer: C. Its structure changes Heat or acid can alter protein structure without removing its amino acids.
Why can cooking improve digestion of some proteins?
A It can unfold their structure
B It removes all amino acids
C It converts protein to fibre
D It prevents enzyme action
Answer: A. It can unfold their structure Cooking can denature proteins, which may make them easier for digestive enzymes to access.
What should be checked when comparing protein on packages?
A Package color
B Serving size and protein amount
C Brand mascot
D Shelf position
Answer: B. Serving size and protein amount Protein amounts are tied to serving sizes, which may differ between products.
Why can a small serving of nuts still add substantial energy?
A Nuts have no calories
B Nuts contain energy-dense fat
C Protein has no energy
D Fibre doubles the serving
Answer: B. Nuts contain energy-dense fat Nuts provide protein but also energy-dense fats, so portions matter.
Does a high-protein claim guarantee a balanced food?
A Yes, every nutrient is adequate
B Yes, it removes added sugar
C No, protein is harmful
D No, check the full label
Answer: D. No, check the full label A high-protein claim does not show the food’s full nutrient profile.
Which choice gives protein and dietary fibre together?
A Butter
B Clear soda
C Beans
D Refined sugar
Answer: C. Beans Beans supply both plant protein and fibre.
How is excess amino acid nitrogen mainly handled?
A Converted for removal
B Stored as protein forever
C Changed into vitamin C
D Kept in red cells
Answer: A. Converted for removal The body processes excess amino nitrogen and removes it, mainly through urine.
Does the body keep a dedicated protein reserve like fat stores?
A No, body proteins have roles
B Yes, unused protein is stored
C Only the liver stores it
D Muscles hold unlimited reserves
Answer: A. No, body proteins have roles Body proteins serve active structural and functional roles rather than forming a dedicated reserve.
Why can skipping meals undermine a protein plan?
A It creates essential amino acids
B May reduce food intake
C It stores extra protein
D It improves every diet
Answer: B. May reduce food intake Regularly missing meals can make it harder to meet overall nutrition needs.
Which choice is a practical protein snack?
A Fruit-flavoured soda
B Hard candy
C Plain sugar
D Roasted chickpeas
Answer: D. Roasted chickpeas Roasted chickpeas can provide protein and fibre as a snack.
What does a protein-rich diet still need?
A Only more protein
B No vegetables or fruit
C Other nutrients and varied foods
D No dietary fat
Answer: C. Other nutrients and varied foods Protein is one part of an overall balanced eating pattern.
Can excess dietary protein directly guarantee muscle gain?
A Yes, regardless of exercise
B Yes, with any powder
C No, training and needs matter
D No, protein has no role
Answer: C. No, training and needs matter Muscle gain depends on training, energy, recovery, and individual needs.
Which statement about protein from plant foods is correct?
A Pulses and soy contain protein
B Plants contain only fibre
C Only nuts provide plant protein
D Grains contain no protein
Answer: A. Pulses and soy contain protein Pulses, soy, nuts, seeds, and grains can all contribute protein.
Why is relying on one protein food less useful?
A It removes all amino acids
B Variety adds dietary diversity
C It causes instant deficiency
D Protein foods are identical
Answer: B. Variety adds dietary diversity Varied protein sources also bring different nutrients and fit different meal patterns.
What should someone consider when choosing protein foods?
A Only the highest claim
B Only package size
C Only advertising language
D Health, preference, and access
Answer: D. Health, preference, and access Practical choices should fit health needs, culture, preferences, and availability.
Which option is a fermented dairy protein food?
A Fruit squash
B Cooking oil
C Table salt
D Plain yogurt
Answer: D. Plain yogurt Yogurt provides protein and can also supply calcium.
How can an eating pattern support protein adequacy?
A Rely on candy
B Drink only water
C Include protein foods regularly
D Avoid all legumes
Answer: C. Include protein foods regularly Including suitable protein sources across meals can help meet individual needs.
What should athletes remember about protein products?
A More is always better
B Check ingredients and need
C Products replace training
D Labels guarantee performance
Answer: B. Check ingredients and need Supplements vary in ingredients and are not a substitute for training or a balanced diet.
Which statement about protein and energy is accurate?
A Protein can provide energy
B Protein has zero calories
C Protein only builds muscle
D Protein cannot be digested
Answer: A. Protein can provide energy Protein can supply energy as well as amino acids for body functions.
Why should older adults discuss poor appetite with a clinician?
A Protein becomes unnecessary
B Needs may go unmet
C Only supplements can help
D Water blocks absorption
Answer: B. Needs may go unmet Poor appetite can affect overall nutrition and deserves individualized assessment.
What best summarizes protein’s place in nutrition?
A Essential, one part of diet
B Only nutrient needed
C A replacement for all foods
D A supplement requirement
Answer: A. Essential, one part of diet Protein is essential, but a balanced pattern includes many nutrients and food groups.