Exam 1 Flashcards
Amylose breaks down starch
true
Polysaccharide is the polymer of sugars.
True
Brad is still wondering about bee preferences and finds an average of 56% of bees prefer yellow while 44% prefer red
flowers. The results from a T-test provide a value of 0.55. What do these t-test results mean?
a) Bees clearly prefer yellow flowers over red flowers.
b) Bees clearly prefer red flowers over yellow flowers.
c) Bees have no clear preference for yellow or red flowers.
d) The experiment has gone wrong.
C
The results from the above experiment support Brad’s ( null or alternative ) hypothesis
Null Hypothesis
A t-test gives you a p-value with a low probability (≤0.05) or less than 5%.
* Does this Support or Reject the Alternative hypothesis?
Support
True or False decreasing the number of samples increases confidence in results
False
Which bands are the largest
The bands closest to the wells
Which bands are the smallest
The bands farthest from the wells
What charge is DNA
Negative
What is a DNA marker or Ladder used for?
It is used to compare are sample to.
To now the sizes of our bands. Usually
as base pairs (bp)
Glucose is a monomer of which type of macromolecule?
Carbohydrates
True or False Starch is a protein.
False
What is the charge at the top
Negative
What is the charge at the bottom
Positive
Lab safety
Closed toed shoes, Shirts that cover stomach, Long pants
Science must be-
Measurable, Definable
How to improve confidence in results
randomize, make control group larger, and have control variables
Independent variable definition
is the variable that is changed
or controlled in a scientific experiment to test the effects on the
dependent variable.
dependent variable definition
is the variable being tested and measured in a scientific experiment.
hypothesis
is a proposed explanation or proposed
result
null hypothesis
there is no casual relationship among variables
Alternative or Working hypothesis
Is our hypothesis, has a cause and effect and has a relationship
T-test and supporting or rejecting Null Hypothesis
If T test>5% then it supports it
If T test<5% then it rejects it
4 types of macromolecules
Lipids
Proteins
Carbohydrates
Nucleic acid
Lipids
- Structural components of cells
- Long-term energy storage
- Cell communication
-Hydrophibic
Carbohydrates
- Energy Storage
- Structure
2 polysaccharides
Starch cellulose
what breaks down starch
amylose
Proteins
*Enzymes
*Transport
*Structure
*Communication
Gel electrophoresis
is a method for separation and
analysis of macromolecules (DNA, RNA and proteins) and their fragments, based on their size or mass and charge
Letters to letters
A to T, G to C
