LIFESCI 2A03 Test 2 Questions and Answers Graded A+
9 views 0 purchase
Course
LIFESCI 2A03
Institution
LIFESCI 2A03
LIFESCI 2A03 Test 2 Questions and
Answers Graded A+
What is the primary role of the mitochondria in cellular respiration?
The mitochondria generate ATP through oxidative phosphorylation, serving as the
powerhouse of the cell.
Which phase of the cell cycle is responsible for DNA replicat...
LIFESCI 2A03 Test 2 Questions and
Answers Graded A+
What is the primary role of the mitochondria in cellular respiration?
✔✔ The mitochondria generate ATP through oxidative phosphorylation, serving as the
powerhouse of the cell.
Which phase of the cell cycle is responsible for DNA replication?
✔✔ The S phase is where DNA replication occurs, ensuring each daughter cell has an identical
set of chromosomes.
How do enzymes function as biological catalysts?
✔✔ Enzymes lower the activation energy of biochemical reactions, speeding up the rate of the
reactions without being consumed in the process.
What is the significance of the G1 checkpoint in the cell cycle?
✔✔ The G1 checkpoint ensures that the cell is ready for DNA synthesis by checking for DNA
damage and sufficient cell size.
1
,How does the process of glycolysis contribute to cellular respiration?
✔✔ Glycolysis breaks down glucose into pyruvate, producing a net gain of 2 ATP molecules and
2 NADH molecules, which are further utilized in the citric acid cycle and oxidative
phosphorylation.
Which organelle is responsible for protein synthesis in the cell?
✔✔ The ribosome is the site of protein synthesis, translating mRNA into polypeptide chains.
What is the importance of apoptosis in maintaining healthy tissue?
✔✔ Apoptosis is a programmed cell death mechanism that removes damaged or unnecessary
cells, preventing the development of tumors and maintaining tissue homeostasis.
How do plant cells differ from animal cells in terms of their structure?
✔✔ Plant cells contain a rigid cell wall made of cellulose, chloroplasts for photosynthesis, and
large central vacuoles, which are not present in animal cells.
What role do lysosomes play in cellular waste management?
✔✔ Lysosomes break down cellular waste, damaged organelles, and macromolecules through
their hydrolytic enzymes, maintaining cellular cleanliness and functionality.
2
, Why is the process of meiosis important for sexual reproduction?
✔✔ Meiosis reduces the chromosome number by half, creating haploid gametes, which are
necessary for maintaining the chromosome number in offspring during fertilization.
What is the key difference between passive and active transport across a cell membrane?
✔✔ Passive transport relies on the concentration gradient and does not require energy, while
active transport uses ATP to move molecules against their concentration gradient.
How does the structure of phospholipids contribute to the formation of cell membranes?
✔✔ Phospholipids have hydrophilic heads and hydrophobic tails, allowing them to form a
bilayer that creates a semi-permeable membrane around cells.
What is the function of the Golgi apparatus in the cell?
✔✔ The Golgi apparatus modifies, sorts, and packages proteins and lipids for secretion or use
within the cell.
How does the electron transport chain contribute to ATP production?
3
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller BrilliantScores. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
