FREE BIOLOGY AND STUDY GAMES ABOUT BIO EXAM 2

PDF Download

FREE BIOLOGY AND STUDY GAMES ABOUT BIO EXAM 2

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -358 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: What happens when the stromata is closed during the day, such those found in CAM plants?

Answer:

Its organic acts are decarboxylated to yield high levels of CO2

Question 2: Electron Transport Chain

Answer:

Series of membrane-bound electron carriers embedded in the inner mitochondrial membrane

Question 3: What is a C4 pathway at night and C3 pathway during the day?

Answer:

CAM

Question 4: What are the 2 enzymatic activities of Rubisco?

Answer:

Carboxylation and Photorespiration

Question 5: In chloroplasts, light-harvesting complexes consist of what?

Answer:

A web of chlorophyll molecules linked together and held tightly in the thylakoid membrane by a matrix of proteins

Question 6: Double Helix

Answer:

• strands of polymer nucleotides wrapped around an axis. Anti-parallel strands

Question 7: Free-energy #

Answer:

-686 kcal/mol of glucose (can be even higher than this in a cell).

Question 8: What did James Watson and Francis Crick propose?

Answer:

A double helix structure

Question 9: What does Eukaryotic Replication require?

Answer:

New Enzymatic activity for dealing with ends only

Question 10: What happens during Redox reactions?

Answer:

Electrons carry energy from 1 molecule to another

Question 11: When the 2 Photosystems work together, what happens?

Answer:

They carry out a noncyclic transfer of electrons that is used to generate both ATP and NADPH

Question 12: What has a higher level of energy? Reduction or Oxidation?

Answer:

Reduction

Question 13: Pyruvate Oxidation occurs where in EUKARYOTES?

Answer:

In mitochondria

Question 14: What happens in Glycolysis

Answer:

Conversion of 1 glucose (6 carbons) into 2 pyruvate (3 carbon)

Question 15: F0 Membrane

Answer:

bound complex

Question 16: What are bacteriophages?

Answer:

Viruses that infect bacteria composed of only DNA and protein Question 17: Who deduced the structure of DNA without performing a single experiment, but rather used evidence from Chargaff, Franklin and others

Answer:

James Watson and Francis Crick - 1953

Question 18: What is another name for the Calvin Cycle?

Answer:

C3 Photosynthesis

Question 19: Allosteric inhibitor

Answer:

Binds to allosteric site and REDUCES enzyme activity

Question 20: Jan Baptista van Helmont (1580-1644)

Answer:

Demnostrated that the substance of the plant was not produced only from soil

Question 21: Glucose Yield After Krebs Cycle: Energy will be put to use to do what?

Answer:

Manufacture ATP

Question 22: What is DNA polymerase II (pol II) do?

Answer:

Involved in DNA repair process

Question 23: Telomeres

Answer:

Specialized structures found on ends of eukaryotic chromosomes that protect the ends of chromosomes from nucleases and maintain the integrity of linear chromosomes

Question 24: What is the Fate of the Pyruvate in Fermentation?

Answer:

Without oxygen, pyruvate is reduced in order to oxidize NADH back to NAD+

Question 25: What are enzymes?

Answer:

• Biological catalysts
• Most are protein, some are RNA

Question 26: Name the 3 segments in the Krebs Cycle

Answer:

• Acetyl-CoA + oxaloacetate --> citrate

• Citrate rearrangement and decarboxylation

• Regeneration of oxalocetate

Question 27: Fermentation

Answer:

• Occurs when oxygen is not available
• Organic molecule is the final electron acceptor