IB Biology Pre-Discussion Questions: Metabolism - Chemoheterotrophic Nutrition
Go through the Prezi below and use the information to answer the questions.
Prezi: http://prezi.com/651ktcegd9gm/copy-of-ap-bio-metabolism-2-chemoheterotrophic-nutrition/
Textbook: Campbell Chapter 9
Supplementary Resources:
“Crash Course: Biology” Videos:
ATP & Respiration: Biology #7
Videos By Paul Anderson:
“Gibb's Free Energy”
“Cellular Respiration”
“Photosynthesis & Respiration”
Part 1: Introduction
Questions to answer:
1.Compare the approaches to energy processing taken by each of the following, and give
an example organism who engages in each mode:
a.Heterotrophs
b.Photosynthetic Autotrophs
c.Chemosynthetic Autotrophs
2.What is the relationship between photosynthesis and aerobic cellular respiration?
3.Why do food molecules need to be broken down into smaller molecules to get energy
from them in biological systems?
4.Why do energy processing reactions in living systems have to be REDOX reactions?
5.In cellular respiration, what is oxidized and what is reduced?
6.What is the role of electron carrier molecules in energy processing systems? Why are
they necessary?
7.State the most likely hypothetical order of evolution of anerobic respiration, aerobic
respiration and photosynthesis. Provide two pieces of evidence to support the hypothesis.
8.What are the most likely prokaryotic ancestors of modern day mitochondria and
chloroplasts? How was this determined?