Hesi A2 Biology Questions & Answers
2024/2025 (GRADED A)
1.Hierarchic Organizational system for nomenclature - ANS -Kingdom
Phylum
Class
Order
Family
Genus
Species (Least)
"Keep Penguins Cool Or Find Good Shelter"
2.Scientific Method - ANS -Observation
Hypothesis
Experiment
Conclusion
3.Water - ANS -All life, and therefore biology , occurs in water. 4.Properties of Water - ANS -2 Hydrogen bonds Covalently bonded to Oxygen.
Hydrogen Bonding between molecules.
- High specific heat
- Large bodies or water stabilize climates
- Strong cohesive and adhesive properties
- Water freezes forms a lattice crystal resulting in ice floating in water.
- Polarity of water allows it to act as a universal solvent.
- Water can be used to dissolve different solvents.
5.Carbohydrates - ANS -Long chains, or polymers of sugar. Most importantly form the backbone of DNA and RNA.
6.Saturated - ANS -Clogs arteries. NO DOUBLE BONDS in their hydrocarbon tail. SOLID @ room temperature.
7.Unsaturated - ANS -Double bond in their hydrocarbon tail. LIQUID at room temperature. 8.Phospholipids - ANS -Phosphate group (polar) soluble in water. Hydrocarbon tail of fatty acids is nonpolar and nonsoluble in water.
Ex. Cell Membrane
9.Steroids - ANS -Are lipids, which are precursors to hormones and drugs
10.Proteins - ANS -They are Polymers of 20 molecules called Amino Acids. Enzymes are a type of protein, which catalyze different reactions or processes. LARGEST Biological Molecule
11.Cell - ANS -Fundamental unit of biology
12.Prokaryotic Cells - ANS -NO defined nucleus and NO membrane- bound organelles.
13.Eukaryotic Cells - ANS -Membrane-enclosed nucleus and series of membrane-bound organelles that carry out the functions of the cell as directed by the genetic information contained in the nucleus.
14.Nucleus - ANS -Contains DNA called Chromosomes.
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 ExamitorMagnus. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.49. You're not tied to anything after your purchase.
