Biology Chapter: Lipids and Vitamins

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What is the primary function of cholesterol in the body?

Acts as a precursor for steroid hormones (correct)

Empowers immune response

Regulates sleep patterns

Provides structural support to cells

Which vitamin is essential for normal bone growth and function?

Vitamin E

Vitamin C

Vitamin D (correct)

Vitamin A

Where are phospholipids predominantly found in the body?

Skeletal muscles

Bloodstream

Cell membranes (correct)

Fat deposits

What role do corticosteroids, specifically glucocorticoids, play in the body?

Help regulate salt and water balance (A) Signup and view all the answers

What is the main function of neurotransmitters derived from prostaglandins?

Regulate blood pressure (D) Signup and view all the answers

Which of the following vitamins is known for its antioxidant properties?

Vitamin E (C) Signup and view all the answers

What structural component differentiates one amino acid from another?

R (side chain) group (C) Signup and view all the answers

What is the core function of lipoproteins in the bloodstream?

Transport fatty acids and cholesterol (C) Signup and view all the answers

What is the primary structure of proteins defined by?

The sequence and location of amino acids (B) Signup and view all the answers

What type of bond is primarily responsible for maintaining the secondary structure of proteins?

Hydrogen bonds (B) Signup and view all the answers

Which of the following proteins are classified as fibrous proteins?

Collagen and keratin (D) Signup and view all the answers

What effect does an acidic pH have on hemoglobin's function?

Leads to loss of function (A) Signup and view all the answers

What type of proteins are known to recognize and neutralize foreign substances in the body?

Antibodies (A) Signup and view all the answers

What is the primary distinguishing feature of globular proteins?

They are compact and water-soluble (D) Signup and view all the answers

What component of DNA distinguishes it from RNA?

The sugar present in the nucleotide (B) Signup and view all the answers

What describes a primary function of enzymes?

Accelerating chemical reactions by lowering activation energy (D) Signup and view all the answers

Which statement correctly describes dehydration synthesis?

It results in the loss of a water molecule to form bonds between monomers. (B) Signup and view all the answers

What is the primary function of glycogen in human cells?

Energy storage. (D) Signup and view all the answers

Which of the following statements about phospholipids is true?

They contain two fatty acids and a phosphate group. (A) Signup and view all the answers

Which type of lipid primarily serves as long-term energy storage?

Triglycerides (C) Signup and view all the answers

What distinguishes saturated fatty acids from unsaturated fatty acids?

Saturated fatty acids contain no double bonds. (A) Signup and view all the answers

Which of the following carbohydrates is a disaccharide?

Maltose (D) Signup and view all the answers

Which carbohydrate serves as a structural component in fungi?

Chitin (C) Signup and view all the answers

What is the main role of omega-3 fatty acids in health?

They decrease the risk of heart disease. (C) Signup and view all the answers