Enzyme Kinetics and Temperature effects Quiz
30 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main factor that determines ESR?

Concentration of fibrinogen in the plasma

Where are most plasma proteins synthesized?

Liver

Which type of proteins are exceptions to being synthesized in the liver?

γ-globulins

What is the characteristic half-life of albumin in circulation?

<p>20 days</p> Signup and view all the answers

Name a positive acute phase reactant that shows a ~1000-fold increase during inflammation.

<p>C-reactive protein</p> Signup and view all the answers

Give an example of a negative acute phase reactant.

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

Describe the structure of phospholipids and explain why they are considered amphipathic.

<p>Phospholipids have a hydrophilic phosphate head and a hydrophobic fatty acid tail, making them amphipathic.</p> Signup and view all the answers

How do saturated and unsaturated fatty acid tails influence membrane fluidity?

<p>Unsaturated fatty acid tails increase membrane fluidity, while saturated fatty acid tails decrease fluidity.</p> Signup and view all the answers

Explain why organisms in cold environments have more unsaturated fatty acids in their membranes.

<p>Unsaturated fatty acids help maintain membrane fluidity at low temperatures.</p> Signup and view all the answers

What is the difference in energy yield between the respiration of lipids and carbohydrates?

<p>Lipids provide twice as much energy as carbohydrates during respiration.</p> Signup and view all the answers

How does the structure of lipids allow them to be compactly stored and not affect the water potential of cell contents?

<p>Lipids are insoluble, allowing them to be stored compactly without affecting water potential.</p> Signup and view all the answers

Explain the role of cholesterol in biological membranes.

<p>Cholesterol provides strength and stability to biological membranes.</p> Signup and view all the answers

How do allosteric enzymes differ from enzymes that follow Michaelis-Menten kinetics?

<p>Allosteric enzymes do not follow Michaelis-Menten kinetics and show a sigmoidal curve.</p> Signup and view all the answers

What happens to the reaction velocity with temperature increase?

<p>The reaction velocity increases with temperature until a peak velocity is reached.</p> Signup and view all the answers

What effect does further elevation of temperature have on reaction velocity?

<p>Further elevation of temperature causes a decrease in reaction velocity due to enzyme denaturation.</p> Signup and view all the answers

What is the optimum temperature range for most human enzymes?

<p>Between 35°C and 40°C.</p> Signup and view all the answers

What is the significance of pH on the active site ionization in enzyme reactions?

<p>The concentration of protons ([H+]) affects reaction velocity by altering the ionization state of specific chemical groups.</p> Signup and view all the answers

Why does the rate of reaction decline at alkaline pH?

<p>The rate of the reaction declines because certain chemical groups required for catalysis become deprotonated.</p> Signup and view all the answers

What enzyme increases in cancer of the prostate?

<p>Acid phosphatase (ACP)</p> Signup and view all the answers

Which enzyme is a diagnostic aid in cases of meningitis and brain tumors?

<p>Isocitrate dehydrogenase</p> Signup and view all the answers

Which enzyme is elevated in MI and reaches peak levels around 2-3 days after infarction?

<p>LDH 1</p> Signup and view all the answers

What enzyme increases in obstructive liver diseases, bone diseases, and hyperparathyroidism?

<p>Alkaline phosphatase (ALP)</p> Signup and view all the answers

Which enzyme is increased in conditions of damage to skeletal muscles?

<p>Creatine Kinase (CKMM)</p> Signup and view all the answers

Which enzyme is increased in heart, brain, and skeletal muscle diseases?

<p>Creatine Kinase (CK)</p> Signup and view all the answers

What major and minor grooves are created by the spatial relationship between the two strands in the DNA double helix?

<p>Major (wide) groove and minor (narrow) groove</p> Signup and view all the answers

How do certain anticancer drugs like dactinomycin exert their cytotoxic effect on DNA double helix?

<p>By intercalating into the narrow groove of the DNA double helix</p> Signup and view all the answers

Which bases are always paired together in DNA double helix?

<p>Adenine (A) with Thymine (T), Cytosine (C) with Guanine (G)</p> Signup and view all the answers

What is the complement of a polynucleotide chain in the DNA double helix?

<p>The other polynucleotide chain</p> Signup and view all the answers

What rule in DNA states that the amount of A equals the amount of T, and the amount of G equals the amount of C?

<p>Chargaff rule</p> Signup and view all the answers

How many hydrogen bonds are between Adenine (A) and Thymine (T), and between Guanine (G) and Cytosine (C)?

<p>Two between A and T, three between G and C</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser