Exam (elaborations)
Praxis Biology Exam (5235) |Questions Solved 100% Correct Answers| Already Passed
- Course
- Institution
Praxis Biology Exam (5235) |Questions Solved 100% Correct Answers| Already Passed
[Show more]
Seller
Follow
Content preview
Praxis Biology Exam (5235) |Questions Solved100% Correct Answers| Already Passed
How did Hershey and Chase determine DNA - ANSWER injected phage DNA and protein. Saw
that the DNA was transferred into the bacteria
Classification of organisms - ANSWER
Relationship among domains - ANSWER
Historical figures in classification of organisms - ANSWER - Linnaeus: father of
modern taxonomy.
- Woese: defined the Archea by using 16s ribosomal RNA
Difference between precision and accuracy - ANSWER - Accuracy refers to the closeness of a
measured value to a standard known value
- Precision refers to the closeness of two or more measurements to each other
Significant figure rules - ANSWER i. Non-zero digits are always significant; 1.121 has four
significant digits.
ii. Any zeros between two significant digits are significant; 1.08701 has six significant digits.
iii. Zeros before the decimal point are placeholders and not significant; in the number .00254,
only the 2,5 and 4 are significant, meaning the number has 3 significant figures.
iv. Zeros after the decimal point and after figures are significant; in the number 0.2540, the 2,
4, 5 and last 0 are significant.
,v. Exponential digits in scientific notation are not significant; 1.12x106has three
significant digits, 1, 1, and 2.
What is a trend? - ANSWER data move in one direction
What are patterns - ANSWER data repeats in a predictable way
types of experimental errors - ANSWER -systemic
errors -random errors
Limitations on scientific models - ANSWER they are usually simplified versions of the real
situation or concept
Difference between logistic and exponential growth - ANSWER Exponential growth: J curve.
population keeps growing
Logistic growth: S curve. population slows down when they hit K
Molarity = - ANSWER mol of solute/L of solution
How to dispose of acidic substances - ANSWER add a base before disposing
Organic vs. Inorganic molecules - ANSWER -Organic molecules: contains Carbon, Hydrogen and
Oxygen.
-Inorganic molecules: Does not contain C,H and O at the same time
What are the 4 organic molecules - ANSWER Carbohydrates
Lipids
Nucleic Acids
,Proteins
What is a polar bond - ANSWER an intermediate case between ionic and covalent bonding. One
end of the molecule is slightly negative and the other end is slightly positive
What is hydrogen bonding - ANSWER where the hydrogen atom of one H20 molecule is
slightly electropositive and the oxygen atom is slightly electronegative
What are the properties of water? - ANSWER high specific heat
high heat of vaporization
universal solvent
high surface tension
cohesion and adhesion
insulator and density
Difference between adhesion and cohesion - ANSWER Cohesion: water bond to water
Adhesion: water bond to anything else
What are the 4 macromolecules - ANSWER Carbohydrates
Nucleic acids
Proteins
Lipids
What are carbohydrates - ANSWER - biological molecules make of carbon, hydrogen and
oxygen.
Types of carbohydrates - ANSWER Monosacchrides (simple sugars like glucose)
Disaccharides (lactose)
, Polysaccharides (start, glycogen)
What are nucleic acids - ANSWER -made out of units called nucleotides
-two naturally occurring varieties (DNA and RNA)
What are proteins - ANSWER Made of chains of amino acids
What lipids - ANSWER -inability to mix well with water
-mostly made of hydrocarbon chains
-Fats
What is osmosis - ANSWER -movement of water through a semipermeable membrane to
a higher concentration of solutes
-passive transport
What is passive transport - ANSWER -transport that does not require energy
-
What is active transport - ANSWER -transport that requires energy
-larger molecules
What is diffusion - ANSWER -movement of molecules from region of higher concentration
to region of low concentration
-passive transport
What is facilitated diffusion - ANSWER -movement of molecules or ions across the cell
membrane from higher concentration to low concentration
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller KenAli. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.29. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75323 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now