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WorksheetsChapter 4: Carbohydrates
Total questions: 45
Worksheet time: 23mins
Which statement best describes the primary physiological role of carbohydrates in the human body?
Provide structural cell membranes and hormones
Supply primary energy and support body functions
Act as sole source of essential amino acids
Maintain fluid balance and electrolyte gradients
Which combination of nutrients is characteristically higher in whole grains compared with refined grains?
Fiber, vitamins, minerals, antioxidants
Calcium, heme iron, omega-3s, lactose
Protein, saturated fat, sodium, cholesterol
Water, simple sugars, trans fats, additives
Select the health outcomes most consistently linked to high intake of refined grains due to nutrient loss. Select all that apply.
Increased risk of diabetes
Lower risk of atherosclerosis
Reduced risk of heart disease
Higher incidence of metabolic disorders
Why does choosing whole grains over refined grains support metabolic balance?
Whole grains increase insulin production
Whole grains reduce total caloric absorption
Whole grains improve nutrient intake and fiber
Whole grains eliminate all dietary sugars
Which historical change in grain processing most directly led to removal of nutrient-rich bran and germ?
Use of quern stones by hand grinding
Adoption of crop rotation and irrigation
Introduction of millstones and waterwheels
Discovery of yeast-based leavening
During ancient grain processing, what effect did labor-intensive methods have on nutrient retention?
They preserved most grain nutrients overall
They removed antioxidants while adding minerals
They reduced vitamins but enhanced simple sugars
They stripped fiber but increased protein content
Early 20th century enrichment programs primarily aimed to address which consequence of refined white flour?
Loss of vital nutrients during refinement
Excessive fiber causing malabsorption
Overfortification with trace elements
Contamination from milling equipment
Which consumer behavior reflects modern whole grain awareness and its public health rationale?
Choosing gluten-free foods to boost antioxidants
Preferring ultra-processed cereals for convenience
Seeking whole grain labels to reduce disease risk
Avoiding bran and germ to prevent bloating
Which elemental ratio most commonly characterizes carbohydrates in basic organic compounds?
2:1:1 hydrogen-carbon-oxygen
2:2:1 hydrogen-oxygen-carbon
1:1:2 carbon-oxygen-hydrogen
1:2:1 carbon-hydrogen-oxygen
Fast-releasing carbohydrates are best exemplified by which molecular class?
Amino sugar derivatives
Polysaccharides and oligosaccharides
Cellulose and lignin polymers
Monosaccharides and disaccharides
Which statement correctly contrasts slow- and fast-releasing carbohydrates regarding glycemic impact?
Slow-releasing carbs blunt spikes; fast-releasing carbs spike
Neither type affects blood glucose levels
Both types cause identical glycemic responses
Slow-releasing carbs spike; fast-releasing carbs blunt
Which of the following are polysaccharides commonly classified as slow-releasing? Select all that apply.
Starch polymers
Dietary fiber fractions
Glucose monomers
Fructose monomers
Which pair correctly matches carbohydrate class with physiological effect on absorption rate?
Monosaccharides—slower absorption
Fiber-rich polysaccharides—slower absorption
Disaccharides—no effect on absorption
Polysaccharides—rapid absorption
Given the sweetness scale where sucrose equals 1.00, which sugar is typically sweeter than sucrose?
Fructose at 1.17–1.75
Lactose at 0.16
Galactose at 0.65
Glucose at 0.74–0.80
Arrange these sugars from sweetest to least sweet based on given values: fructose, sucrose, glucose.
Fructose > sucrose > glucose
Sucrose > fructose > glucose
Glucose > fructose > sucrose
Sucrose > glucose > fructose
Which sugars are classified as monosaccharides in human nutrition? Select all that apply.
Glucose
Fructose
Lactose
Sucrose
Which statement about lactose is consistent with the sweetness data provided?
It is equally sweet compared to sucrose
It is substantially less sweet than sucrose
Its sweetness exceeds glucose by a wide margin
It is the sweetest common dietary sugar
For dietary planning in diabetes, which carbohydrate choice most supports glycemic control?
Low-fiber refined disaccharides
High-sucrose sweetened beverages
Rapidly absorbed monosaccharides
Fiber-rich polysaccharides like starch
Which enzyme initiates starch digestion in the oral cavity by producing maltose and dextrins?
Salivary amylase in mouth
Brush-border lactase in ileum
Hepatic glucokinase in liver
Pancreatic amylase in duodenum
During small intestinal digestion, which process converts dietary polysaccharides into absorbable monosaccharides?
Bile emulsification of lipids
Hepatic gluconeogenesis in hepatocytes
Pancreatic amylase plus brush-border enzymes
Gastric pepsin proteolysis
After absorption, what is the primary fate of monosaccharides entering the portal circulation?
Immediate renal excretion in urine
Transport to liver for conversion and regulation
Storage in adipose tissue unchanged
Oxidation by cardiac muscle exclusively
Which statement best links carbohydrate type to physiological outcomes?
Carbohydrate type has no impact on insulin
Carbohydrate type shapes glucose spikes and energy
Carbohydrate type only affects taste perception
Carbohydrate type controls amino acid synthesis
Identify the correct classification for a food with glycemic load equal to 20 points.
Unclassified category threshold
Medium category classification
Low category classification
High category classification
Select all statements that accurately describe glycemic load categories.
Low GL is less than or equal to 10
High GL is greater than or equal to 20
Medium GL is less than or equal to 10
Medium GL ranges from 11 to 19
Which pairing correctly matches digestive location with primary carbohydrate enzyme?
Colon—pancreatic amylase action
Mouth—salivary amylase action
Jejunum—pepsin dominant action
Stomach—salivary amylase action
Which combination is essential for completing carbohydrate digestion at the intestinal surface?
Intrinsic factor and gastric acid
Pancreatic lipase and bile salts
Pancreatic amylase and brush-border enzymes
Trypsin and chymotrypsin proteases
A meal causes minimal blood glucose rise and supports sustained energy. Which carbohydrate profile most likely explains this response?
High glycemic load with rapid absorption
Medium glycemic load with mixed fibers
Low glycemic load with slower digestion
Random glycemic load without categorization
Which statement best describes glycogen’s role in human physiology?
Primary blood buffer for acid–base balance
Stored glucose polymer in liver and muscle
Hormone secreted during fasting states
Main structural fiber in connective tissue
Which outcome reflects the protein-sparing action of adequate carbohydrate intake?
Increased gluconeogenesis from amino acids
Enhanced conversion of protein to ketones
Reduced protein catabolism for energy
Accelerated urea production in the liver
Which combination accurately contrasts Type 1 and Type 2 diabetes?
Autoimmune insulin deficiency vs insulin resistance predominant
Insulin resistance predominant vs autoimmune beta-cell recovery
High ketone production in Type 2 vs rare ketosis in Type 1
Gestational onset common vs childhood obesity exclusive
Which cellular function most directly uses carbohydrate-derived carbon skeletons?
Generation of nitric oxide from arginine
Assembly of collagen and elastin
Formation of bile salts and steroids
Synthesis of nucleic acids and ATP
Adequate carbohydrate availability helps prevent ketosis primarily by:
Boosting ketone body synthesis in liver
Providing oxaloacetate for acetyl-CoA oxidation
Increasing fatty acid beta-oxidation rate
Lowering insulin to mobilize adipose lipolysis
Which long-term complication is correctly associated with poor glycemic control?
Decreased cardiovascular event risk
Reduced peripheral nerve sensitivity
Improved corneal hydration and vision
Enhanced renal filtration and clearance
Which strategies collectively stabilize postprandial blood glucose in diabetes management? Select all that apply.
Distributing carbohydrate across meals
Choosing higher quality carbohydrate sources
Controlling total carbohydrate quantity
Eliminating all dietary fats to lower insulin
Which statement best links carbohydrate intake to performance and health?
Adequate carbohydrates support cognitive performance
Carbohydrates impair immune cell function
High carbohydrate intake halts hormone secretion
Carbohydrates eliminate need for endurance training
Which dietary and lifestyle approach most effectively reduces Type 2 diabetes risk? Select all that apply.
Routine physical activity with weight management
Balanced diet emphasizing fiber-rich foods
Eliminating all carbohydrate-containing foods
Structured meal timing to avoid large spikes
Which statement correctly identifies diabetes categories relevant to clinical care?
Only Type 2 diabetes affects adults
Type 1, Type 2, and gestational diabetes exist
Gestational diabetes is a childhood disorder
Type 1 diabetes is caused by excess sugar intake
Which statement best defines the Acceptable Macronutrient Distribution Range (AMDR) for carbohydrates shown in the chart?
Protein grams needed to prevent deficiency
Upper limit for added sugar grams
Grams of fiber recommended daily
Percent of calories recommended daily
What is the Recommended Dietary Allowance (RDA) for total carbohydrates per day?
25 grams per day
45 grams per day
65 grams per day
130 grams per day
Which intake target applies to added sugars according to the table?
Thirty-eight grams for all adults
Forty-five to sixty-five percent
At least 130 grams daily
Less than 25 grams daily
Select the correct fiber RDA values listed in the chart. Select all that apply.
45 grams for men
25 grams for women
38 grams for men
65 grams for women
Which combination of foods aligns with selecting nutrient-dense carbohydrates?
Fruit juices, sports drinks, sweetened tea
Refined grains, syrups, candy, pastries
Processed meats, cheese slices, butter
Whole grains, legumes, nuts, seeds
Which cooking practice helps preserve fiber and moderate glycemic response?
Boil grains until very soft
Fry potatoes, add sugary sauces
Overcook pasta, peel potatoes deeply
Cook pasta al dente, keep potato skins
Which beverage swap most effectively reduces sugar intake?
Replace sodas with undiluted fruit juice
Replace sodas with sweet smoothies
Replace sodas with energy drinks
Replace sodas with water or herbal teas
Which strategy supports lower-carbohydrate substitutions while maintaining satiety?
Avoid vegetables and add creamy sauces
Increase starchy sides and sugary condiments
Use non-starchy vegetables and lean proteins
Rely on refined grains and sweet beverages
