2CB3 Midterm II
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Questions and Answers

Where is the first NADH molecule produced in cellular respiration?

  • Conversion of pyruvate to acetyl coenzyme A (correct)
  • Conversion of acetyl coenzyme A to pyruvate
  • Reduction of oxygen to water
  • In the cytoplasm

    • Which of the following disease is caused by the deterioration of the myelin sheath?

  • muscular dystrophy
  • Alzheimer's Disease
  • Diabetes
  • Multiple sclerosis (correct)

    • A molecule with a very low electron transfer potential is most likely

  • An oxidizing agent (correct)
  • A reducing agent
  • An amphoteric molecule
  • An amphiphilic molecule

    • Reduction of which enzyme could lead to a rare congenital disorder, Zellweger syndrome, that lead to death during early infancy.

    <p>peroxisomes or Peroxisomal enzymes</p> Signup and view all the answers

    The light-driven splitting of a water molecule is known as _______.

    <p>photolysis</p> Signup and view all the answers

    Which of the following is not TRUE about thylakoid

    <p>Thylakoid membrane arranged in stacks called stroma</p> Signup and view all the answers

    Mitochondrial dysfunction can cause

    <p>All of the above</p> Signup and view all the answers

    Please help identifying the membrane protein to your colleague which is found entirely outside the bilayer on either the extracellular or cytoplasmic surface? These proteins are covalently linked to a membrane lipid situated within the bilayer.

    <p>lipid-anchored protein</p> Signup and view all the answers

    What is liposome? Why we use in therapeutics?

    <p>A liposome is a small vesicle composed of a lipid bilayer, which closely resembles the structure of cell membranes. These vesicles can encapsulate and deliver a variety of substances, such as drugs, enzymes, or genetic material.</p> <p>Liposomes are effective for addressing medications like chemotherapy or antifungal treatments, which may exhibit toxicity towards healthy cells or pose a risk of organ damage.</p> Signup and view all the answers

    Which technique is often used to identify transmembrane segments of integral proteins?

    <p>hydropathy plot</p> Signup and view all the answers

    Which of the following equations is correct?

    <p>FAD + 2 electrons + 2 protons -&gt; FADH2</p> Signup and view all the answers

    What enzyme was used to determine the asymmetry of the membrane lipids

    <p>Phospholipase</p> Signup and view all the answers

    Which TCA cycle enzyme is found in the inner mitochondrial membrane? Please write the name of the enzyme only.

    <p>Succinate Dehydrogenase</p> Signup and view all the answers

    Which of the following statement is not TRUE about magnesium

    <p>Porphyrin ring lacks magnesium</p> Signup and view all the answers

    Which of the following is NOT TRUE for ubiquinone

    <p>It transfer electrons to complex IV</p> Signup and view all the answers

    How many carbons from 20 original glucose molecules enter the Krebs cycle in the presence of oxygen?

    <p>120</p> Signup and view all the answers

    How DNP killed people who took the drug to lose weight?

    <p>DNP is a chemical compound that, in the past, has been used as a weight-loss aid. However, it is highly toxic and is not approved for human consumption. The mechanism by which DNP can lead to fatalities is through its ability to uncouple oxidative phosphorylation in mitochondria.</p> <p>DNP was once used for weight loss, which is highly toxic and unsafe for human consumption. Its fatality arises from its ability to disrupt mitochondrial oxidative phosphorylation, leading to inefficient ATP production and increased heat generation. This elevated metabolic rate can cause hyperthermia, risking organ failure. Due to severe complications, including hyperthermia, dehydration, and respiratory distress, DNP is strongly discouraged for any weight loss purposes.</p> Signup and view all the answers

    Which of the following statement is true?

    <p>Plant cell's primary source of reducing power is NADPH</p> Signup and view all the answers

    You determine the transition temperatures for two membranes. The first has a transition temperature of 28°C, the second a transition temperature of 15°C. What can you conclude about the compositions of the two membranes?

    Signup and view all the answers

    Which of the following equations is correct?

    <p>FAD + 2 electrons + 2 protons -&gt; FADH2</p> Signup and view all the answers

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