# Ap biology essay scoring guidlines respiration

The response also earned 1 point for describing that the excess energy was lost as heat. Each test is curved so scores vary from year to year.

### Ap biology essay scoring guidlines respiration

Sample: 2B Score: 8 The response earned 1 point in part a for describing that NADH produced in glycolysis is later used in the electron transport chain. Finally, students were asked to pose a scientific question connecting the cellular location of the Krebs cycle in prokaryotes and eukaryotes to the evolution of eukaryotes. The response also earned 1 point for describing that the excess energy was lost as heat. The response earned 1 point in part d for posing a valid scientific question related to the evolution of eukaryotes The College Board. The grid-in quantitative questions require the integration of science and mathematical skills. Answers can be in the form of integers, decimals, or fractions. Learn more about AP credit policies. You will have 80 minutes to answer all 8 questions and a minute reading period, giving you a total amount of 90 minutes for this section. Overview This question was based on the biochemistry and evolution of aerobic cellular respiration. The response earned 1 point in part c for calculating kcal. The response earned 1 point in part b for citing glycolysis as an example of a homologous cellular process that justifies the observation that nearly all existing organisms perform glycolysis.

The response earned 1 point in part d for posing a valid scientific question related to evolution of eukaryotes. Students were then asked to describe the fate of excess energy that is released from the metabolism of glucose. To fully understand the four big ideas, a solid grasp of the following topics is required.

Overview This question was based on the biochemistry and evolution of aerobic cellular respiration.

### Ap biology free response 2014

The response earned 1 point in part b for citing that the early Earth had an atmosphere with low concentrations of O 2 as a way to justify the observation that glycolysis occurs under anaerobic conditions The College Board. Learn more about AP credit policies. The response earned 1 point for citing that the process had to be performed by a very simple organism lacking internal membrane structures to justify the observation that glycolysis occurs only in the cytosol. Finally, students were asked to pose a scientific question connecting the cellular location of the Krebs cycle in prokaryotes and eukaryotes to the evolution of eukaryotes. The response also earned 1 point for describing that the energy provided by the protons flowing through ATP synthesis is used to create ATP. Answers can be in the form of integers, decimals, or fractions. The response also earned 1 point for describing that the excess energy was lost as heat. Students were then asked to describe the fate of excess energy that is released from the metabolism of glucose.

The grid-in quantitative questions require the integration of science and mathematical skills. Sample: 2B Score: 8 The response earned 1 point in part a for describing that NADH produced in glycolysis is later used in the electron transport chain.

The response earned 1 point for citing that the early Earth had an atmosphere with low concentrations of O 2 to justify the observation that glycolysis occurs under anaerobic conditions.

Finally, students were asked to pose a scientific question connecting the cellular location of the Krebs cycle in prokaryotes and eukaryotes to the evolution of eukaryotes.

Sample: 2A Score: 10 The response earned 1 point in part a for describing that NADH produced in glycolysis is used in the electron transport chain.

The response earned 1 point in part b for citing that membrane-bound organelles are not needed for glycolysis, so early bacteria could have performed glycolysis as a way to justify the observation that glycolysis occurs only in the cytosol.

The response earned 1 point in part b for citing that the early Earth had an atmosphere with low concentrations of O 2 as a way to justify the observation that glycolysis occurs under anaerobic conditions The College Board.

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