Biology Chapter: Lipids and Vitamins

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Questions and Answers

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?

<p>Help regulate salt and water balance (A)</p> Signup and view all the answers

What is the main function of neurotransmitters derived from prostaglandins?

<p>Regulate blood pressure (D)</p> Signup and view all the answers

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

<p>Vitamin E (C)</p> Signup and view all the answers

What structural component differentiates one amino acid from another?

<p>R (side chain) group (C)</p> Signup and view all the answers

What is the core function of lipoproteins in the bloodstream?

<p>Transport fatty acids and cholesterol (C)</p> Signup and view all the answers

What is the primary structure of proteins defined by?

<p>The sequence and location of amino acids (B)</p> Signup and view all the answers

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

<p>Hydrogen bonds (B)</p> Signup and view all the answers

Which of the following proteins are classified as fibrous proteins?

<p>Collagen and keratin (D)</p> Signup and view all the answers

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

<p>Leads to loss of function (A)</p> Signup and view all the answers

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

<p>Antibodies (A)</p> Signup and view all the answers

What is the primary distinguishing feature of globular proteins?

<p>They are compact and water-soluble (D)</p> Signup and view all the answers

What component of DNA distinguishes it from RNA?

<p>The sugar present in the nucleotide (B)</p> Signup and view all the answers

What describes a primary function of enzymes?

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

Which statement correctly describes dehydration synthesis?

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

What is the primary function of glycogen in human cells?

<p>Energy storage. (D)</p> Signup and view all the answers

Which of the following statements about phospholipids is true?

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

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

<p>Triglycerides (C)</p> Signup and view all the answers

What distinguishes saturated fatty acids from unsaturated fatty acids?

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

Which of the following carbohydrates is a disaccharide?

<p>Maltose (D)</p> Signup and view all the answers

Which carbohydrate serves as a structural component in fungi?

<p>Chitin (C)</p> Signup and view all the answers

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

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

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