Al Rowad International School
Girls’ Section
Subject: Biology
Grade: 9SAT
Teacher: Banan
I.
Science Department
School year 2020-2021
Student Name:
Date
Worksheet(4.5&4.6)
Cellular respiration &fermentation
Fill in the blank .
1. _Glycloysis____is an anaerobic process ,takes a place in the
cytoplasm , and produces small number of ATP.
2. In glycolysis __2ATP_are used to energize a glucose molecule. Then
glucose molecule splits into ___2Three carbon molecules__
3. The products of glycolysis are
___2ATP__,_____2NADH____,and____2pyruvate___
4. Pyruvate and NADH are produced by glycolysis then they are used in
__Cellular respiration __ when oxygen is available .
5. _NADH_and _FADH2__are electron carriers that work in cellular
respiration .
6. _Glycolysis_makes more ATP than glycolysis .
7. The two main stages of Cellular respiration are __Krebs cycle
___and____Electron transport chain _____
8. Krebs cycle takes a place in _Matrix___
9. The function of Krebs cycle to __transfer energy to the electron
transport chain __
10.
Pyruvate is broken down before it enters the Krebs cycle .the
products are__NADH__,___CO2___,and___Two carbon molecule ___
11.
Pyruvate is broken down and changed to __Two carbon molecule-
CoA_then enters Krebs cycle .
12.
Two Carbon molecule –CoA enters the cycle and joins with
__Four carbon molecule ___then CoA leaves the cycle.__Citric acid
__ is formed
Al Rowad International School
Girls’ Section
13.
Science Department
School year 2020-2021
Citric acid is broken down .The products are:
__NADH__,___CO2___,and__five carbon molecule ____
14.
Five Carbon molecule is broken .The products are
___NADH__,___ATP___,____CO2___,and___Four carbon molecule _
15.
Four carbon molecule is rearranged then
___FADH2__,______NADH____are produced .
16.
Breaking down one Pyruvate produces
__3CO2___,_4NADH__,___1FADH2_,__1ATP_
(before and from Krebs cycle )
17.
Breaking down one glucose produces
_6CO2__,__8NADH_,__2FADH2__,____2ATP__
(Before and from Krebs cycle)
18.
Electron transport chain takes a place in ___and across the
inner mitochondrial membrane _
19.
The Function of electron transport chain is __________to make
ATP______________________
20.
The first thing that happen in the electron transport chain
__Electrons are removed __
21.
High energy electrons move through _electron transport chain
(group of proteins )__.
22.
The proteins use the energy from the electrons to ___pump H+
ions against the concentration gradient ___
23.
The difference of the concentration of H+ is called
__Chemiosmotic gradient __
24.
Hydrogen ions flow through ___ATP synthase_____to make ATP
by adding ____phosphate group to ADP_____
25.
Oxygen is used by the end to _pick electrons and H+__then it
forms ___Water_____
26.
Breaking down one glucose molecule produces _up to 38_ATP
Al Rowad International School
Girls’ Section
Science Department
School year 2020-2021
(___2_ATP from glycolysis ,____2__ATP from Krebs cycle ,and
___34__ATP from electron transport chain )
27.
_Photosynthesis __stores energy from sunlight as chemical
energy .
28.
__Cellular respiration_releases stored energy as heat and ATP .
29.
Compare between photosynthesis and cellular respiration .
Organelle for
the process
The two main
stages
Photosynthesis
Chloroplast
Cellular respiration
Mitochondrion
1.Light-dependent reactions
1.Krebs cycle
2.Light-independent
reactions
2.Electron transport chain
Location of
Thylakoid membrane
Inner mitochondrial membrane
electron
transport
chain
Location and
Stroma (builds sugar)
Krebs cycle (transfer energy to
function of
electron transport chain )
the cycle
The chemical 6CO2+6H2OC6H12O6+6O2 C6H12O6+6O26CO2+6H2O+ATP
equation
Sunlight/Enzymes
30.
__Fermentation _allows glycolysis to continue when oxygen is not
available .
31.
Fermentation takes a place in _the cytoplasm__and it does not
use oxygen .
32.
If there is no oxygen in the cell ,the cell go through
_Fermentation__
33.
The main function of fermentation is ___to allow glyclysis to
continue __
Al Rowad International School
Girls’ Section
34.
Science Department
School year 2020-2021
The two types of fermentation are _Lactic acid fermentation
_,___Alcoholic fermentation ______
35.
Lactic acid fermentation happens in __microorganisms
_and__muscle ___cells
36.
Lactic acid fermentation produces __NAD+__and__Lactic
acid___
37.
Lactic acid in muscle cells causes __burning feeling ___
38.
Lactic acids in yogurt gives ___Sour taste ___
39.
When oxygen is available in muscle cells what happens to lactic
acids ?___it will breakdown___
40.
Alcohol fermentation happens in __Yeasts __and __some types
of plants __
41.
The products from alcohol fermentation are __Alcohol
__,____CO2_____and____NAD+___
42.
When the dough is baked , the alcohol _Evaporates __,the
yeast __is killed __,and carbon dioxide __causes the dough to rise
up__.