Respiratory System & Micrograph – Biochemistry Quiz

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Respiratory System, Micrograph, Biopsy, ATP, Concentration Gradients – Biochemistry

The key terms in this Biochemistry course include Biopsy, Micrograph, ATP, Concentration Gradients, Active Transport, Respiratory System, Calvin cycle, light reactions, citric acid cycle, NADH, CO2, FADH2,


Lauren is a senior at a nearby high school. She is a good student who does her work on weekdays and likes to party on the weekends with her friends. A few months ago, Lauren developed a persistent cough that has worsened over time. She has also had trouble breathing over the past week or so. Her parents decided it was time she see a doctor and made an appointment with the family physician. Lauren arrived at the doctor’s office the following day. The doctor asked her a number of questions about her health history and daily habits, including, whether or not she smoked cigarettes. Lauren responded that she started smoking cigarettes (about 2 per day) her freshman year of high school and does not intend to quit anytime soon.

The doctor decided it was necessary to take a biopsy of the cells that line the bronchus (passageway to the lungs). After several days, the biopsy report has come back along with a micrograph of the bronchial cells. Lauren’s cigarette smoking has badly damaged these organelles which are responsible for mucous  and dirt moving up-and-out of her respiratory system. Analyze the micrograph below and determine what cell organelles have been damaged.

Respiratory System & Micrograph - Biochemistry Quiz

Smooth ER

Peroxisome

mitochondria

Cilia– correct

Flagella

lysosome


Two different systems are shown for transporting solutes across membranes. In the first system, sodium and potassium ions (Na+ and K+) are moved up their concentration gradients, in opposite directions, using energy from ATP hydrolysis. In the second, protons move from high to low concentration, which allows transport of sucrose in the same direction, up its concentration gradient. Which is a correct statement?

Respiratory System & Micrograph - Biochemistry Quiz

System 2 uses a channel protein.

Systems 1 and 2 are both examples of active transport- correct

System 1 is active transport, and system 2 is passive transport.

The System 1 is exocytosis, and system 2 is endocytosis.

System 2 is an example of facilitated diffusion.


In a plant, which of the following reactions produce molecular oxygen (O2)?

the light reactions alone- correct

the Calvin cycle alone

the light reactions and the Calvin cycle

neither the light reactions nor the Calvin cycle


Which of the following combinations of products would result from three acetyl CoA molecules entering the citric acid cycle?

1 ATP, 2 CO2, 3 NADH, and 1 FADH2

3 ATP, 3 CO2, 3 NADH, and 3 FADH2

3 ATP, 6 CO2, 9 NADH, and 3 FADH2- correct

6 ATP, 6 CO2, 3 NADH, and 12 FADH2


How many NADH molecules are produced on each turn of the citric acid cycle?

one

two

three- correct

four


The figure illustrates the energy states associated with the reaction A + B ↔ C + D. Which of the following represents the activation energy required for the enzyme-catalyzed reaction in the figure?

Fatty Acid Tail & Glucose Levels - Biochemistry Exam

a

b– correct

c

d


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