Which of the following statements provides evidence to support the claim that no ATP?

Practice Test QuestionsUnit 4 Cellular Energetics_____ 6. The enzyme hexokinase catalyzes the conversion of glucose to glucose-6-phosphate, which is animportant step in glycolysis. The reaction involved the transfer of a phosphate group from ATP toglucose.Either a glucose molecule or a water molecule can fit in the active site of hexokinase. The presence of awater molecule in hexokinase’s active site would result in the hydrolysis of ATP to ADP instead of theconversion of glucose to glucose-6-phosphate.Which of the following statements best helps explain the reaction specificity of hexokinase?

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______ 7.In chloroplasts, ATP is synthesized from ADP plus inorganic phosphate (Pi) in a reaction catalyzedby ATP synthase molecules that are embedded in the thylakoid membrane.Which of the following statements provides evidence to support the claim that no ATP will be synthesizedin the absence of a proton gradient across the thylakoid membrane?

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A researcher claims that increased atmospheric carbon dioxide levels cause increased growth rates in plants. Which of the following statements best supports the researcher’s claim?

Atmospheric carbon dioxide is the raw material for photosynthesis, which plants rely on for producing sugars and other organic compounds.

In chloroplasts, ATP is synthesized from ADP plus inorganic phosphate (Pi) in a reaction catalyzed by ATP synthase molecules that are embedded in the thylakoid membrane. Which of the following statements provides evidence to support the claim that no ATP will be synthesized in the absence of a proton gradient across the thylakoid membrane?

No ATP is synthesized when channel proteins that allow the free passage of protons are inserted into the thylakoid membrane.

A scientist claims that Elysia chlorotica, a species of sea slug, is capable of photosynthesis. Which of the following observations provides the best evidence to support the claim?

Elysia chlorotica grows when exposed to light in the absence of other food sources.

In the Arctic Ocean, the predominant primary producers are phytoplankton. Phytoplankton are consumed by zooplankton, which in turn are eaten by codfish. In years when there is more open water (less ice coverage), there are more zooplankton and fish than in years with less open water (more ice coverage). Based on the graph above, the difference is most likely because

the ice blocks the light, so in years with more ice coverage, there is less photosynthesis by the phytoplankton

Cellular respiration includes the metabolic pathways of glycolysis, the Krebs cycle, and the electron transport chain, as represented in the figures. In cellular respiration, carbohydrates and other metabolites are oxidized, and the resulting energy-transfer reactions support the synthesis of ATP. A researcher estimates that, in a certain organism, the complete metabolism of glucose produces 30 molecules of ATP for each molecule of glucose. The energy released from the total oxidation of glucose under standard conditions is 686 kcal/mol. The energy released from the hydrolysis of ATP to ADP and inorganic phosphate under standard conditions is 7.3 kcal/mol. Calculate the amount of energy available from the hydrolysis of 30 moles of ATP. Calculate the efficiency of total ATP production from 1 mole of glucose in the organism. Describe what happens to the excess energy that is released from the metabolism of glucose.

give summary explanation on each diagram. Calculations: AVALABLE ENERGY (Avagadros Number: gas law)=219 kcalsEFFICIENCY: 30-32%explain entropy.

Which of the following questions will best direct an investigation of the mechanism of ATP synthase?

Is the phosphorylation of ADP by ATP synthase dependent on the formation of a proton gradient?

According to the chemiosmotic theory (chemiosmotic coupling), the energy required to move protons from the mitochondrial matrix to the intermembrane space against a concentration gradient comes most directly from

electrons flowing along the electron transport chain

According to the data, the crickets at 25o C have greater oxygen consumption per gram of tissue than do the crickets at 10o C. This trend in oxygen consumption is the opposite of that in the mice. The difference in trends in oxygen consumption among crickets and mice is due to their

mode of internal temperature regulation

According to the data, the mice at 10o C demonstrated greater oxygen consumption per gram of tissue than did the mice at 25o C. This is most likely explained by which of the following statements?

The mice at 10o C had a higher rate of ATP production than the mice at 25o C

During aerobic cellular respiration, oxygen gas is consumed at the same rate as carbon dioxide gas is produced. In order to provide accurate volumetric measurements of oxygen gas consumption, the experimental setup should include which of the following?

A substance that removes carbon dioxide gas

According to the data, the crickets at 25oC have greater oxygen consumption per gram of tissue than do the crickets at 10oC. This trend in oxygen consumption is the opposite of that in the mice. The difference in trends in oxygen consumption among crickets and mice is due to their

mode of internal temperature regulation

According to the data, the mice at 10oC demonstrated greater oxygen consumption per gram of tissue than did the mice at 25oC. This is most likely explained by which of the following statements?

The mice at 10oC had a higher rate of ATP production than the mice at 25oC.

During aerobic cellular respiration, oxygen gas is consumed at the same rate as carbon dioxide gas is produced. In order to provide accurate volumetric measurements of oxygen gas consumption, the experimental setup should include which of the following?

A substance that removes carbon dioxide gas

Answers must be in essay form. Outline form is not acceptable. Labeled diagrams may be used to supplement discussion, but in no case will a diagram alone suffice. It is important that you read each question completely before you begin. Many biological structures are composed of smaller units assembled into more complex structures having functions based on their structural organization. For the following complex structures, describe the smaller units, their assembly into the larger structures, and one major function of these larger, organized structures. An inner membrane of a mitochondrion.

talk about units of structure: phospholipids and their protein components talk about organization or proteins: folding of mitochondria electron transport system: has to do with proteins

ATP serves as a common energy source for organisms because

its energy can be easily transferred to do cellular work

Many aquatic animals can hold their breath and dive underwater for long periods of time. During long dives, lactic acid builds up in tissues of the organism. The graph above shows blood lactate levels following dives of different duration for three species. Lactate is produced when lactic acid is dissolved in the blood and becomes ionized. Based on the data, propose a hypothesis to explain the change in blood lactate levels in Weddell seals for dives lasting longer than 20 minutes.

talk about lactate levels (due to anaerobic metabolism or fermentation)

Which of the following best explains why triploid bananas do not produce seeds?

Which of the following statements best predicts the effect of increasing the concentration of substrate ethyl alcohol?

Which of the following statements correctly explains the observed effect of the acetylcholine concentration on the rate of the enzyme catalyzed reaction?

Which of the following statements best explains how the lead ion causes inhibition of alad?