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Cellular Respiration Worksheet
- What are the 3 phases of the cellular respiration process? Glycolysis, Krebs Cycle, Electron Transport
- Where in the cell does the glycolysis part of cellular respiration occur? in the cytoplasm
- Where in the cell does the Krebs (Citric Acid) cycle part of cellular respiration occur? in the mitochondria
- Where in the cell does the electron transport part of cellular respiration occur? in the mitochondria
- How many ATP (net)are made in the glycolysis part of cellular respiration? 2 (net)
- How many ATP are made in the Kreb’s cycle part of cellular respiration? 2
- How many ATP are made in the electron transport part of cellular respiration? 32 – 34
- In which phase of cellular respiration is carbon dioxide made? Krebs Cycle
- In which phase of cellular respiration is water made? Electron Transport
- In which phase of cellular respiration is oxygen a substrate? Electron Transport
- In which phase of cellular respiration is glucose a substrate? Glycolysis
- On average, how many ATP can be made from each NADH during the electron transport process? 3
- On average, how many ATP can be made from each FADH 2 during the electron transport process? 2
- What would happen to the cellular respiration process if the enzyme for one step of the process were missing or defective? The entire process beyond that point could not happen.
- What happens to the high-energy electrons (and hydrogen) held by NADH if there is no O 2 present? If no oxygen is present, the pyruvic acid must take the electrons (and their hydrogens) back.
- Explain why this happens. This happens because there are only a small number of NAD
- molecules in the cell. They must be reused to keep glycolysis going with additional glucose molecules. This means they need to “unload” the electrons from NADH by giving them to some other molecule. Since the pyruvic acid cannot continue on to the Krebs cycle when there is no oxygen present, it receives the electrons. This allows the glycolysis portion of cellular respiration to continue even when O 2 is not present. This process of making ATP in the absence of O 2 is called fermentation
- What is the overall reaction for fermentation in yeast? Glucose 2 Ethyl alcohol + 2 CO2 + 2 ATP + Heat
- What is the overall reaction for lactic acid fermentation? Glucose 2 Lactic Acid + 2 ATP + Heat
- Only a small part of the energy released from the glucose molecule during glycolysis is stored in ATP. How is the rest of the energy released? (HINT: It is a product in the overall reaction for cellular respiration.) It is released as heat. ANSWERS FOR THE BONUS WILL BE POSTED AFTER THE TEST. BONUS – Answer the questions below on a separate sheet of paper and turn them in before the test. They are worth a possible of 5 bonus points on the test.
- When your cells use fat for energy, the fatty acids are broken up into molecules of acetyl CoA. Predict how many ATP can be made from one molecule of acetyl CoA if oxygen is present. Show your work.
- Suppose that each fatty acid in a certain fat can make 9 molecules of acetyl CoA. Predict how many ATP can be made from the fatty acids in this fat. (Remember there are 3 fatty acids in the fat molecule.)
slides videos websites texts accompanied by illustrations files MP worksheets smart board computer texts accompanied by illustrations SKILLS Ability to analise, report and give reasons of phenomena and concepts Digital competence LANGUAGE SKILLS Reading comprehension without the help of dictionary To describe a process, either orally or in the written form, using specific lexis and mastering the syntax ACTIVITIES TEACHER’S STUDENT’S LANGUAGE Introduci ng the topic by multimedia, skimming and scanning the documents workshee ts on lexis and contents Watching videos, taking notes team work glossary Matching words and definitions listening and labelling pictures listening and filling-in the gaps FINAL PROJECT PPT group presentations ASSESSMENT CRITERIA
SUMMATIVE FORMATIVE task performance content mastery communicative competence participation effort collaborative engagement ASSESSMENT TASKS objective tests: multiple choice, true/false oral presentations open questions ATTACHED DOCUMENTS
- Video: https://www.youtube.com/watch?v=-Gb2EzF_XqA
- Worksheet 1
- Worksheet 2
- Worksheet 3
- Worksheet 4
- Rurbic oral presentations
- Text
- Pre test
- Post test Post-Test Respiration The correct answer for each question is indicated by a. 1 If ATP synthase is enzymatically neutralized within a cell, which of the following consequences would be the most logical outcome? A) Negative feedback will be decreased, causing faster ATP production. B) The electron transport chain will slow down. C) The cell will have no mechanism to make ATP and will die. D) Phosphylation of ADP will decrease. E) All of the above will occur. 2 For one molecule of glucose, what is the maximum number of ATP molecules created directly from the Krebs cycle? A) 1
C) Some ATP is created through substrate-level phosphorylation. D) Overall, glycolysis releases energy and is thus termed^ exergonic. E) All of the above statements are true. 9 Where in a eukaryotic cell does pyruvate oxidation occur? A) In the mitochondrion. B) In the electron transport chain. C) In the cytoplasm, just like in prokaryotes. D) Anywhere in the cell, provided pyruvate dehydrogenase is present. E) In ribosomes. 10 The Krebs cycle is responsible for making most of the cell's ATP. A) True B) False 11 Which of the following is most directly responsible for creation of ATP at the mitochondrial inner membrane? A) NADH B) A proton gradient C) FADH 2 D) Movement of electrons along the membrane itself E) The activity of NADH dehydrogenase 12 Which of these is one of the correct reasons that less than the theoretical amount of ATP (36-
- is actually created during aerobic respiration? A) Because of the efficiency of chemiosmosis, the result is actually much higher. B) FADH2 actually consumes some ATP. C) The cell membrane is somewhat leaky to electrons. D) The proton gradient can facilitate other tasks besides ATP synthesis. E) You have to add in ATP produced during glycolysis, which has nothing to do with oxidation. 13 True or False: The purpose of fermentation is to make ethanol. A) True B) False 14 What process must occur to allow amino acids to be catabolized for energy? A) Deamination B) Depurination C) Dephosphorylation D) Dehydration E) Deoxygenation 15 Primitive prokaryotes probably used H 2 S instead of water as a source of electrons. What
would have been released into the environment as photosynthesis occurred? A) Gaseous hydrogen B) Liquid hydrogen C) Water D) HS E) Sulfur Pre-Test Respiration The correct answer for each question is indicated by a. 1 Why does NAD
serve as important electron carrier? A) It is readily reduced and oxidized. B) It is insoluble and is stationary within the cell. C) It can accept electrons in a variety of positions along its length. D) It "protects" electrons from winding up in fatty acid precursors where the energy would be wasted. E) All of the above are correct. 2 What products result from the complete oxidation of glucose? A) CO B) ATP C) NADH D) FADH E) All of these result from glucose oxidation. 3 Why must NAD+^ be present during glycolysis? A) It creates pyruvate directly from glucose. B) A glycolysis intermediate must be oxidized in order to receive a phosphate so that substrate-level phosphorylation may occur. C) It powers the electron transport chain. D) It is a coenzyme which allows^ the 6 carbons of glucose to separate from each other, leading to two three-carbon products. E) This is a trick question: NAD
is only involved in the Krebs cycle. 4 What is/are the product(s) of pyruvate oxidation? A) O 2 B) Acetyl-CoA C) NAD
D) ATP E) All of the above are created during pyruvate oxidation 5 How many CO 2 molecules are released specifically from the Krebs cycle for each glucose molecule consumed?
LANGUAGE OBJECTIVES
by the end of the module the students will be able to… look up information, analyse and summarize it, even using dictionary understand and illustrate concepts, relating them with specific lexis interact both with schoolmates and teacher RESOURCES & MATERIALS slides videos websites texts accompanied by illustrations files MP worksheets smart board computer texts accompanied by illustrations SKILLS Ability to analise, report and give reasons of phenomena and concepts Digital competence LANGUAGE SKILLS Reading comprehension without the help of dictionary To describe a process, either orally or in the written form, using specific lexis and mastering the syntax ACTIVITIES
TEACHER’S STUDENT’S LANGUAGE
Introducing the topic by multimedia, skimming and scanning the documents worksheets on lexis and contents Watching videos, taking notes team work glossary Matching words and definitions listening and labelling pictures listening and filling-in the gaps FINAL PROJECT PPT group presentations ASSESSMENT CRITERIA SUMMATIVE FORMATIVE task performance content mastery communicative competence participation effort collaborative engagement ASSESSMENT TASKS objective tests: multiple choice, true/false oral presentations open questions ATTACHED DOCUMENTS (Allegati)
D)dentin
6 INCORRECT^
Which of these is not one of the three pairs of extrinsic salivary glands? A)parotid B)palatine C)submandibular D)sublingual
7 CORRECT^
Within the stomach lining, _________________ cells secrete hydrochloric acid. A)parietal B)goblet C)principal D)argentaffin
8 INCORRECT^
During which phase of gastric secretion is gastric juice released? A)cephalic phase B)gastric phase C)intestinal phase D)All of these are correct.
9 INCORRECT^ Which of these is a structural modification unique to the small intestine?
A)plicae circulares B)villi C)microvilli D)All of these are unique to the small intestine. E)None of these are unique to the small intestine.
10 INCORRECT^
The longitudinal muscle layer of the large intestine forms three distinct muscle bands called ____________________. A)sigmoid colon B)taeniae coli C)haustra D)epiploic appendages
11 INCORRECT^
Within the liver, bile is produced by __________________ and secreted into bile canaliculi. A)Kupffer cells B)liver lobules C)hepatocytes D)acinar cells
12 INCORRECT^
The condition in which the liver becomes infused with fibrous tissue and is unable to repair itself is known as ___________________.
A)hepatitis B)cirrhosis C)jaundice D)hepatoma
1 CORRECT^
It usually takes between 24 and 48 hours for food to travel the length of the gastrointestinal tract. A)True B)False
2 INCORRECT
Parasympathetic impulses to the gastrointestinal tract generally inhibit peristalsis and secretions while impulses from the sympathetic division increase the rate of digestion. A)True B)False
3 CORRECT
The endocrine functions of the pancreas are performed by the pancreatic islets, while the exocrine secretory functions are provided by the pancreatic acini. A)True B)False
Use the words in the box to fill in the blanks.
stomach
rectum
waste
system
acid
chewed
liver
saliva
swallow
absorbed
food
mouth
large intestine
tongue
liquids
energy
small intestine
digestion
pharynx
esophagus
absorb
appendix
chew
digest
esophagus
excrete
filter
large intestine
liver
mouth
Name………………… Class……………..
Find the digestive
system words
below in the grid to
the left.
excrete
filter
large intestine
liver
mouth
nutrients
pancreas
pharynx
rectum
saliva
small intestine
© 2006 www.bogglesworldesl.com
Name………………… Class……………..
Enzymes Worksheet
Find the digestive
system words
below in the grid to
the left.
small intestine
stomach
swallow
teeth
tongue
- a) Fill in the gaps in the following sentences using the words in the box below. i) Enzymes are biological living organisms. ii) Enzymes are protein molecules, which are made up of long chains of ………...………. iii) The sequence and type of amino acids are produce enzymes with many different shapes and functions. iv) The shape of an enzyme is very impo b) Enzymes catalyze chemical reactions involved in important processes in the human body. Name one of these processes …………………………………………………………………………………………………… … c) Label the image below with the following terms: active site, reactant, enzyme. d) i) What is the common name for the above model? …………………………………………………………………………………………………… …. ii) Label the two components of this model on the above image. different catalysts function the same amino acids catalists ………..…....... Fill in the gaps in the following sentences using the words in the box below. Enzymes are biological (^) ………………… that speed up chemical reactions in Enzymes are protein molecules, which are made up of long chains of The sequence and type of amino acids are (^) ………………… in each protein, so they produce enzymes with many different shapes and functions. iv) The shape of an enzyme is very important to its (^) …………………. Enzymes catalyze chemical reactions involved in important processes in the human body. Name one of these processes. …………………………………………………………………………………………………… Label the image below with the following terms: active site, reactant, enzyme. i) What is the common name for the above model? …………………………………………………………………………………………………… ii) Label the two components of this model on the above image.
different catalysts function the same amino acids catalists ………………..... Fill in the gaps in the following sentences using the words in the box below. that speed up chemical reactions in Enzymes are protein molecules, which are made up of long chains of in each protein, so they Enzymes catalyze chemical reactions involved in important processes in the …………………………………………………………………………………………………… Label the image below with the following terms: active site, reactant, enzyme. …………………………………………………………………………………………………… different catalysts function the same amino acids catalists …….…...…… …..............
d) i) What would happen to an enzyme if the temperature and pH changed significantly beyond the enzyme’s optimum level? ……………………………………………………………………………………..…………... ii) How would this affect enzyme activity? ……………………………………………………………..…………………..…….………… …………………………………………………………………………………..………….…… …..
- A group of students decided to carry out an investigation to find out how enzyme activity is affected by temperature changes. They put samples of salivary amylase and starch into two test tubes. Salivary amylase is an enzyme that breaks down starch into maltose. Its optimum temperature for activity is around 37°C. a) What do you think happened to the rate of reaction when they increased the temperature of the first test tube to 37°C? …………………………………………………………………………………………………..….… ... b) What do you think happened to the enzyme activity when the students decreased the temperature of the second test tube to O°C? ............................................................................................................................................... .... c) Explain what an inhibitor is and what it does. ……………………………………………………………………………………………………… …… ……………………………………………………………………………………………….……… …..
- a) Fill in the missing words in the following text about enzymes and digestion.
Not all enzymes work inside cells in the body. ………………… enzymes are produced by specialized cells in the pancreas and digestive tract. From pass out of the cells, into the intestine where they come into contact with fo Here, they catalyze the (^) ………………… then more easily absorbed by the body. b) Write down the name of the nutrient next to the enzyme that breaks it down. Use the words in the box below. i) Carbohydrase is an enzym ii) Protease is an enzyme that breaks down iii) Lipase is an enzyme that breaks down iv) Amylase is an enzyme that breaks down c) The stomach produces hydrochloric acid which stomach to the optimum pH for stomach enzymes to digest the food. However, digestive enzymes found in the small intestine a conditions. How does the body avoid damaging the digestive enzymes in the small intestine with this strongly acidic pH as the food passes out of the stomach? …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… ………………………………………………………………………………… fats sucrose starch proteins carbohydrates hydrochloric acid Not all enzymes work inside cells in the body. enzymes are produced by specialized cells in the pancreas and digestive tract. From there, the enzymes into the (^) ………………… and small intestine where they come into contact with food molecules. ………………… of large molecules, which are then more easily absorbed by the body. Write down the name of the nutrient next to the enzyme that breaks it down. Use the words in the box below. is an enzyme that breaks down (^) ……………………… is an enzyme that breaks down (^) ……………………… is an enzyme that breaks down (^) ……………………… is an enzyme that breaks down (^) ……………………… The stomach produces hydrochloric acid which increases the acidity of the stomach to the optimum pH for stomach enzymes to digest the food. However, digestive enzymes found in the small intestine are damaged by strongly acidic
. How does the body avoid damaging the digestive enzymes in the small intestine with this strongly acidic pH as the food passes out of the …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………... sucrose starch proteins carbohydrates hydrochloric acid Write down the name of the nutrient next to the enzyme that breaks it down. … increases the acidity of the stomach to the optimum pH for stomach enzymes to digest the food. However, re damaged by strongly acidic . How does the body avoid damaging the digestive enzymes in the small intestine with this strongly acidic pH as the food passes out of the …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… ... sucrose starch proteins carbohydrates hydrochloric acid
