Cellular respiration and photosynthesis are both processes that require a variety of different enzymes, however they can differ in that
biochemical pathways

Quiz
•
Science
•
12th Grade
•
Medium
Kenji Chew
Used 25+ times
FREE Resource
30 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
cellular respiration requires coenzymes to facilitate the steps, whereas photosynthesis relies on the actions of Rubisco
cellular respiration is a catabolic pathway that results in the formation of energy-rich glucose, whereas photosynthesis is an anabolic pathway that requires chlorophyll to first absorb energy from the Sun
they utilise different coenzymes that assist the enzymes involved by acting as electron donors and acceptors.
photosynthesis results in the assembly of low-energy inorganic carbon dioxide molecules into energy-rich glucose, whereas cellular respiration breaks down glucose into ADP molecules for use in important metabolic reactions
Answer explanation
Cellular respiration uses coenzymes NADH and FADH, whereas photosynthesis uses NADPH. ATP is considered a coenzyme helper for several enzymes that catalyse reactions in cellular respiration
2.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Coenzymes assist the catalytic actions of enzymes. NAD is a coenzyme that functions to
accept hydrogen and their associated electrons in its unloaded form
accept hydrogens and their associated electrons it its reduced state
donate hydrogens and their associated electrons it its oxidised state
A. donate hydrogens and their associated electrons it its unloaded state.
Answer explanation
NAD functions as a hydrogen acceptor when it is unloaded (oxidised). When it is loaded (reduced), it can donate hydrogens and their associated electrons.
3.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
A coenzyme helper that can accept a phosphate group to catalyse an energy-requiring reaction
ATP
NADP+
ADP
FAD
4.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Above the optimum temperature, enzymes tend to
move more slowly, and thus colliding less frequently with its substrate, resulting in a slower rate of reaction
have less energy to interact with its substrate, resulting in a slower rate of reaction
collide more frequently with the substrate, resulting in a faster rate of reaction until denaturation occurs
denature irreversibly at the active site, such that is is unable to bind to its substrate
5.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Bone alkaline phosphatase (BAP) is an enzyme that is attached to the outside of the cell membrane of bone-forming cells called osteoblasts. The BAP enzyme plays a crucial role in the mineralisation of bone, aiding the formation and growth of bones. The pH optimum for the enzyme alkaline phosphatase has been shown to vary under various laboratory conditions but has never been shown to be lower than a pH of 8. This means that
at pH 10, the BAP enzyme will be most likely have bonds between it's active site and substrate's binding site, allowing for the enzyme to effectively catalyse the reaction
at pH levels lower than 8, the bonds within the BAP enzyme can be altered, allowing the enzyme to combine at more sites on the substrate
at pH levels higher than 8, the ionic bonds within the BAP enzyme denature, reducing the activity of the enzyme.
at a neutral pH, there are changes in the amount of ionic bonds holding the 3D structure of BAP together, however the changes are negligible such that the reaction rate remains the same.
Answer explanation
we are given a wide pH range for BAP to function effectively — any pH above 8.
Below 8, the pH will be below optimum levels, and would alter bonds that are formed between the enzyme and its substrate.
This leads to a reduced rate of reaction. A neutral pH would be sub-optimal – already the reaction rate would have decreased
6.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
When all the active sites of an enzyme are occupied by substrate molecules, the rate of reaction
increases steadily, producing more products.
decreases quickly, as less substrates can be reacted with enzymes.
stays the same, until more substrates are added to the reaction
stays the same until temperature is increased
Answer explanation
When enzyme sites are full, there can be no significant change in reaction rate. An increase in substrate will not change the rate of reaction as there still will not be enough enzyme active sites to catalyse the reaction. An increase in temperature will, however, increase the frequency of collisions between enzymes and substrates, increasing the rate of reaction
7.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
The actions of phosphofructokinase (PFK) enzyme in glycolysis is tightly regulated by ATP. When ATP levels are high, ATP binds to a secondary site on PFK, causing the enzyme’s affinity for its substrate to decrease. In this biochemical pathway, ATP acts as
cofactor
competitive inhibitor binding to the enzyme's active site
a non competitive inhibitor binding to an allosteric site
an allosteric activator
Create a free account and access millions of resources
Similar Resources on Wayground
25 questions
Photosynthesis Light Reactions AP Biology

Quiz
•
12th Grade - University
25 questions
Tiffany Jones AP Bio

Quiz
•
12th Grade - University
25 questions
AP Unit 3 Quiz

Quiz
•
12th Grade
25 questions
Light Independent Reaction Photosynthesis

Quiz
•
9th Grade - University
25 questions
AP Bio Unit 3 Review

Quiz
•
12th Grade - University
25 questions
Light Dependent and Independent Reactions

Quiz
•
9th Grade - University
25 questions
Light Dependent Cycle

Quiz
•
10th Grade - University
25 questions
AP Cellular Respiration

Quiz
•
12th Grade - University
Popular Resources on Wayground
25 questions
Equations of Circles

Quiz
•
10th - 11th Grade
30 questions
Week 5 Memory Builder 1 (Multiplication and Division Facts)

Quiz
•
9th Grade
33 questions
Unit 3 Summative - Summer School: Immune System

Quiz
•
10th Grade
10 questions
Writing and Identifying Ratios Practice

Quiz
•
5th - 6th Grade
36 questions
Prime and Composite Numbers

Quiz
•
5th Grade
14 questions
Exterior and Interior angles of Polygons

Quiz
•
8th Grade
37 questions
Camp Re-cap Week 1 (no regression)

Quiz
•
9th - 12th Grade
46 questions
Biology Semester 1 Review

Quiz
•
10th Grade