100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
IB Biology - Molecular Biology Exam Questions Correctly Answered. $11.49   Add to cart

Exam (elaborations)

IB Biology - Molecular Biology Exam Questions Correctly Answered.

 6 views  0 purchase
  • Course
  • Ib biology
  • Institution
  • Ib Biology

IB Biology - Molecular Biology Exam Questions Correctly Answered. Name the most frequent elements in life - CORRECT ANSWER CHON (Carbon, hydrogen, oxygen, nitrogen, and are main elements found in organic molecules in organisms) 5 other necessary elements for life - CORRECT ANSWER Sulfur: fo...

[Show more]

Preview 2 out of 11  pages

  • September 18, 2024
  • 11
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • ib biology
  • Ib biology
  • Ib biology
avatar-seller
Nursewendo
IB Biology - Molecular Biology Exam
Questions Correctly Answered.

Name the most frequent elements in life - CORRECT ANSWER CHON (Carbon, hydrogen, oxygen,
nitrogen, and are main elements found in organic molecules in organisms)



5 other necessary elements for life - CORRECT ANSWER Sulfur: found in 2 amino acids

Calcium: chemical messenger that helps regulate cell processes

Phosphorus: ATP and DNA, RNA (phosphate)

Iron: needed in cytochromes for electron transport chains, hemoglobin

sodium: water balance/homeostasis, pumped into cells for water uptake, nerves



Compound - CORRECT ANSWER 2 or more elements combined in a fixed ratio



Ionic bonds - CORRECT ANSWER one atom strips valence electrons from another atom (high
electronegativity difference), electron transfer creates ions (charged atoms)



Covalent bonds - CORRECT ANSWER sharing pair of valence electrons, # of electrons required to
complete an atom's valence shell determines how many bonds will form



Molecule - CORRECT ANSWER elements covalently bonded



Nonpolar covalent bonds - CORRECT ANSWER Electrons shared equally



Polar covalent bonds - CORRECT ANSWER One atom more electronegative than the other (creates
partial charges)



Hydrogen bond - CORRECT ANSWER Attraction (weak) between a partially positive H atom of one polar
molecule and a partially negative atom (O or N) of another polar molecule

, What 2 things can the many properties of water be attributed to? - CORRECT ANSWER Its polarity and
hydrogen bonds



List the thermal properties of water - CORRECT ANSWER High specific heat, high heat of vaporization,
and high boiling point



High specific heat - CORRECT ANSWER (Amount of heat absorbed)/(amount of heat lost/change
temperature by 1°C)

(1 cal)/(g/°C)



High heat of vaporization - CORRECT ANSWER quantity of heat required to convert 1g from liquid to gas
states (Evaporative cooling/sweat)



High boiling point - CORRECT ANSWER Water has a boiling point of 100°C



Compare the properties of water vs. methane (think thermal properties) - CORRECT ANSWER Water has
almost 2x the specific heat capacity of methane, water heat of vaporization is almost 3x that of
methane, melting and boiling points of methane are lower than water



List the cohesive properties of water - CORRECT ANSWER Cohesion, surface tension



Cohesion - CORRECT ANSWER H bonds holding water molecules together



Surface tension - CORRECT ANSWER Measurement of the difficulty to break or stretch the surface of a
liquid



List the solvent properties of water - CORRECT ANSWER -water is a very good solvent, sometimes called
the "universal solvent"

-substances that are able to dissolve in water are polar or ionic



Solution - CORRECT ANSWER completely homogenous mixture, diffused solute in solvent

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 Nursewendo. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $11.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

72042 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$11.49
  • (0)
  Add to cart