Biol 181 MIDTERM ACTUAL EXAM WITH 100% RATED CORRECT
REAL EXAM QUESTIONS AND CORRECT ANSWERS| GRADED A+
|2025 LATEST VERSION | 100% VERIFIED
What makes carbon essential to biological molecules?
A. It dissolves easily in water
B. It is always inorganic
C. It can form stable bonds with many elements, allowing for complex molecules
D. It is the most reactive element - (ANSWER)C. It can form stable bonds with many elements,
allowing for complex molecules
Which of the following is an organic molecule?
A. Water
B. Salt
C. Carbon dioxide
D. Glucose - (ANSWER)D. Glucose
What is a key difference between organic and inorganic molecules?
A. Organic molecules never contain hydrogen
B. Inorganic molecules always contain carbon and hydrogen
C. Organic molecules have a carbon backbone bonded to hydrogen
D. Inorganic molecules are always found in living organisms - (ANSWER)C. Organic molecules
have a carbon backbone bonded to hydrogen
What is a monomer?
A. A chain of molecules
B. A fat molecule
,C. A single subunit of a larger molecule
D. A type of enzyme - (ANSWER)C. A single subunit of a larger molecule
Which of the following is a polymer?
A. Glucose
B. Fructose
C. Starch
D. Galactose - (ANSWER)C. Starch
What elements make up carbohydrates in the approximate ratio of 1:2:1?
A. Carbon, nitrogen, oxygen
B. Carbon, hydrogen, sulfur
C. Carbon, hydrogen, oxygen
D. Hydrogen, oxygen, nitrogen - (ANSWER)C. Carbon, hydrogen, oxygen
Which of the following is a monosaccharide?
A. Sucrose
B. Glucose
C. Lactose
D. Maltose - (ANSWER)B. Glucose
Which disaccharide is found in milk?
A. Maltose
B. Sucrose
C. Glucose
D. Lactose - (ANSWER)D. Lactose
,What polysaccharide do animals use to store carbohydrates?
A. Starch
B. Glycogen
C. Cellulose
D. Chitin - (ANSWER)B. Glycogen
Which carbohydrate is indigestible to humans but acts as dietary fiber?
A. Glycogen
B. Starch
C. Cellulose
D. Maltose - (ANSWER)C. Cellulose
What structural carbohydrate makes up exoskeletons of insects and fungi cell walls?A. Glycogen
B. Cellulose
C. Chitin
D. Fructose - (ANSWER)C. Chitin
What makes lipids different from carbohydrates in terms of solubility?
A. Lipids are hydrophilic
B. Lipids are hydrophobic
C. Lipids dissolve easily in water
D. Lipids are made mostly of nitrogen - (ANSWER)B. Lipids are hydrophobic
Which type of fat is typically solid at room temperature and comes from animals?
A. Unsaturated fat
B. Saturated fat
C. Phospholipids
, D. Steroids - (ANSWER)B. Saturated fat
Why are unsaturated fats liquid at room temperature?
A. They contain triple bonds
B. They have no hydrogen
C. They contain double bonds that "kink" the carbon chains
D. They are highly saturated - (ANSWER)C. They contain double bonds that "kink" the carbon
chains
What type of lipid is used as a waterproof coating in plants and insects?
A. Oils
B. Phospholipids
C. Waxes
D. Steroids - (ANSWER)C. Waxes
Which of the following is true about phospholipids?
A. They contain only carbon and hydrogen
B. Both ends are water-soluble
C. They have a polar head and nonpolar tails
D. They are used for energy storage - (ANSWER)C. They have a polar head and nonpolar tails
Phospholipids are a major component of:
A. Muscle fibers
B. Bone tissue
C. Cell membranes
D. Red blood cells - (ANSWER)C. Cell membranes
REAL EXAM QUESTIONS AND CORRECT ANSWERS| GRADED A+
|2025 LATEST VERSION | 100% VERIFIED
What makes carbon essential to biological molecules?
A. It dissolves easily in water
B. It is always inorganic
C. It can form stable bonds with many elements, allowing for complex molecules
D. It is the most reactive element - (ANSWER)C. It can form stable bonds with many elements,
allowing for complex molecules
Which of the following is an organic molecule?
A. Water
B. Salt
C. Carbon dioxide
D. Glucose - (ANSWER)D. Glucose
What is a key difference between organic and inorganic molecules?
A. Organic molecules never contain hydrogen
B. Inorganic molecules always contain carbon and hydrogen
C. Organic molecules have a carbon backbone bonded to hydrogen
D. Inorganic molecules are always found in living organisms - (ANSWER)C. Organic molecules
have a carbon backbone bonded to hydrogen
What is a monomer?
A. A chain of molecules
B. A fat molecule
,C. A single subunit of a larger molecule
D. A type of enzyme - (ANSWER)C. A single subunit of a larger molecule
Which of the following is a polymer?
A. Glucose
B. Fructose
C. Starch
D. Galactose - (ANSWER)C. Starch
What elements make up carbohydrates in the approximate ratio of 1:2:1?
A. Carbon, nitrogen, oxygen
B. Carbon, hydrogen, sulfur
C. Carbon, hydrogen, oxygen
D. Hydrogen, oxygen, nitrogen - (ANSWER)C. Carbon, hydrogen, oxygen
Which of the following is a monosaccharide?
A. Sucrose
B. Glucose
C. Lactose
D. Maltose - (ANSWER)B. Glucose
Which disaccharide is found in milk?
A. Maltose
B. Sucrose
C. Glucose
D. Lactose - (ANSWER)D. Lactose
,What polysaccharide do animals use to store carbohydrates?
A. Starch
B. Glycogen
C. Cellulose
D. Chitin - (ANSWER)B. Glycogen
Which carbohydrate is indigestible to humans but acts as dietary fiber?
A. Glycogen
B. Starch
C. Cellulose
D. Maltose - (ANSWER)C. Cellulose
What structural carbohydrate makes up exoskeletons of insects and fungi cell walls?A. Glycogen
B. Cellulose
C. Chitin
D. Fructose - (ANSWER)C. Chitin
What makes lipids different from carbohydrates in terms of solubility?
A. Lipids are hydrophilic
B. Lipids are hydrophobic
C. Lipids dissolve easily in water
D. Lipids are made mostly of nitrogen - (ANSWER)B. Lipids are hydrophobic
Which type of fat is typically solid at room temperature and comes from animals?
A. Unsaturated fat
B. Saturated fat
C. Phospholipids
, D. Steroids - (ANSWER)B. Saturated fat
Why are unsaturated fats liquid at room temperature?
A. They contain triple bonds
B. They have no hydrogen
C. They contain double bonds that "kink" the carbon chains
D. They are highly saturated - (ANSWER)C. They contain double bonds that "kink" the carbon
chains
What type of lipid is used as a waterproof coating in plants and insects?
A. Oils
B. Phospholipids
C. Waxes
D. Steroids - (ANSWER)C. Waxes
Which of the following is true about phospholipids?
A. They contain only carbon and hydrogen
B. Both ends are water-soluble
C. They have a polar head and nonpolar tails
D. They are used for energy storage - (ANSWER)C. They have a polar head and nonpolar tails
Phospholipids are a major component of:
A. Muscle fibers
B. Bone tissue
C. Cell membranes
D. Red blood cells - (ANSWER)C. Cell membranes
