Mutiple choice

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) In absence of oxygen, a yeast cell undergoes fermentation and uses 100 molecules of glucose. How much net ATP will be generated? A) 100 B) 36 C) 400 D) 300 E) 200 2) All the following statements pertaining to catalysts are true EXCEPT A) catalysts are not permanently altered during reaction. B) catalysts increase reaction rate. C) catalysts increase activation energy requirements. D) biological catalysts are specific enzymes. E) catalysts can be used over and over again. MULTIPLE CHOICE. Choose the one alternative that best completes the statem... click for more

Each question poses a fundamental metabolic problem

3) Louis Pasteur (a French biochemist) investigated the metabolism of yeast which can survive under aerobic or anaerobic conditions. He observed that the yeast consumed sugar at a much faster rate under anaerobic conditions than it did under aerobic conditions. Explain this Pasteur effect. 4) If a plant is kept for many days in the dark, glucose is not produced, even though the sugar producing reactions are called light-independent. Why is glucose not produced in this case? 5) Explain how the leaf is adapted for capturing energy from the Sun and acquiring carbon dioxide and water. 9) The dinosaurs likely died off from a lack of sunlight. What does this statement imply abo... click for more

Short Answers

Louis Pasteur (a French biochemist) investigated the metabolism of yeast which can survive under aerobic or anaerobic conditions. He observed that the yeast consumed sugar at a much faster rate under anaerobic conditions than it did under aerobic conditions. Explain this Pasteur effect. If a plant is kept for many days in the dark, glucose is not produced, even though the sugar producing reactions are called light-independent. Why is glucose not produced in this case? Explain how the leaf is adapted for capturing energy from the Sun and acquiring carbon dioxide and water. The insecticide rotenone inhibits one of the steps of the electron transport system in mitochondri... click for more

Experiment

Suppose an experiment is performed in which plant I is supplied with normal carbon doixide but with water that contains radioactive oxygen atom. Plant II is supplied with normal water but with carbon dioxide that contains radioactive oxygen atoms. Each plant is allowed to perform photosynthesis, and oxygen gas and sugars produced are tested for radioactivity. Which plant would one expect to produce radioactive sugar and which one would produce radioactive oxygen gas? Why is that?

A few questions I am interested in finding out more on

What are some of the ADVANTAGES of mapping the entire human genome? What are some of the DISADVANTAGES of mapping the entire human genome? What is biotechnology, and what are some examples? Discuss the ethical issues surrounding the use of one of the examples.