MCAT · Biology 1 · Chapter 1 · Section 1.1

Chapter 1: Biological Molecules and Enzymes

Section 1.1: Introduction

STUDY 

Question 1:
Name 4 classifications of most biological molecules, give an example for each, and name a similarity between them all.
→ Lipids: phospholidpid
     Proteins: collagen
     Carbohydrates: amylose
     Nucleotide derivatives: ATP (= Adenosine TriPhosphate)
→ Similarity: carbon skeleton

Question 2:
In living organisms, biological molecule's personality is _____ and it matches _____.
→ Structure and polarity
     Practical usage

Question 3:
Enzyme-substrate fit correlates with _____ and _____.
→ Enzyme effectiveness
     Lower K_m

Question 4:
Competitive inhibitors bind to _____ (location) and _____ (action).
→ Active site
     Block it

Question 5:
Non-competitive inhibitors bind to _____ (location) and _____ (action).
→ Separate site
     Change shape of active site

Question 6:
Un-competitive inhibitors bind to _____ (location) and _____ (action).
→ Enzyme-substrate complex
     Decrease concentration of substrate that can react

PRACTICE

Question 1:
Name 4 classifications of most biological molecules, give an example for each, and name a similarity between them all.

Question 2:
In living organisms, biological molecule's personality is _____ and it matches _____.

Question 3:
Enzyme-substrate fit correlates with _____ and _____.

Question 4:
Competitive inhibitors bind to _____ (location) and _____ (action).

Question 5:
Non-competitive inhibitors bind to _____ (location) and _____ (action).

Question 6:
Un-competitive inhibitors bind to _____ (location) and _____ (action).

ANSWER KEY

Question 1:
→ Lipids: phospholidpid
     Proteins: collagen
     Carbohydrates: amylose
     Nucleotide derivatives: ATP (= Adenosine TriPhosphate)
→ Similarity: carbon skeleton

Question 2:
→ Structure and polarity
     Practical usage

Question 3:
→ Enzyme effectiveness
     Lower K_m

Question 4:
→ Active site
     Block it

Question 5:
→ Separate site
     Change shape of active site

Question 6:
→ Enzyme-substrate complex
     Decrease concentration of substrate that can react