Bio 141 Notes (1/30/2014) Flashcards Preview

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Flashcards in Bio 141 Notes (1/30/2014) Deck (22):
1

Fatty Acids

Saturated
Unsaturated (double bonds)

2

First Law of Thermodynamics

Conservation of energy: cannot be created or destroyed (can be transferred)
ex. of biological transfer - energy comes from food, energy in food comes from photosynthesos

3

Chemical Enrergy

molecules retain some of the energy used to make them

4

Endergonic

reactions require energy imput

5

Exergonic

breakdown of molecules can release energy
reactions release energy
exit

6

Metabolism

The sum of all reactions in a particular organism

7

Anabolic

Simple -> Complex (build up)

8

Catabolic

Complex -> Simple (break down)

9

Second Law of Thermodynamics

Disorder tends to increase
energy transfer is inefficient
some energy escapes the heat

10

Calories

a unit of energy
originally determined using a 'bomb calorimeter'

11

DNA and RNA consist of...

Nucleotides

12

Proteins (polypeptides) consist of ...

amino acids

13

Nucleotide

simple unit
phosphate +5-C sugar + base

14

Bases contain two or more...

Nitrogen
often called 'nitrogenous'

15

Pyrimidines

Cytosine (C)
Thymine (T)
RNA - Uracil (U)
1 ring shape

16

Purines

Adenine (A)
Guanine (G)
2 ring shape

17

Base Pairing

matching between neucleotide pairs
A - T
C - G

18

DNA

two complementary DNA strands
essentially duplicating the same strands
antiparallel

19

mRNA

messenger
copy instructions from DNA and convey them to the protein making ribose

20

tRNA

deliver amino acids to a developing protein in right order

21

rRNA

compose part of the ribose

22

RNA Secondary Structure

RNA folds back upon itself to yield a functional 3D molecule