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BIOC 301 EXAM 1 QUESTIONS AND VERIFIED ANSWERS

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BIOC 301 EXAM 1 QUESTIONS AND VERIFIED ANSWERS...

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BIOC 301
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BIOC 301









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Institution
BIOC 301
Module
BIOC 301

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Uploaded on
November 24, 2024
Number of pages
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Written in
2024/2025
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Biochemistry - ANSWER The application of chemistry to the study of
biological processes at the cellular and molecular level

Central dogma - ANSWER Self-replicating DNA undergoes unidirectional
transfer to messenger RNAs in transcription which act as templates for protein
synthesis in translation

DNA - ANSWER Genetic information storage of all life (except of some
viruses). Deoxyribonucleic acid. Instructions to direct synthesis of RNA and
DNA

Atmosphere of early earth - ANSWER H2, CH4, NH3, HCN, H2O, some CO
and CO2

Miller-Urey experiment result - ANSWER Showed under conditions of early
earth building blocks like amino acids can arise

Evolution - ANSWER The ability to make a copy and retain information. Any
improvement to your system's ability to be reproduced is selected for and
improved upon with each cycle

Polymerization reactions - ANSWER Reactions to create polymers of the basic
building blocks

RNA world hypothesis - ANSWER A hypothetical stage in the evolutionary
history of life of Earth in which self-replicating RNA molecules proliferated
before the evolution of DNA and proteins

Why do we use DNA? - ANSWER Presence of the 2'OH group on RNA
significantly reduces its stability

Coulombs law - ANSWER E = (kQaQb)/εr

, Van der Waals forces - ANSWER Noncovalent interactions occurring between
neutral groups that are brought close together

Bond angle of water - ANSWER 104.5°

Hydrogen bond - ANSWER Electrostatic attraction between oxygen of one
water molecule and the hydrogen of another

Hydrogen bond donor - ANSWER The atom to which the hydrogen atom
participating in the hydrogen bond is covalently bonded (NOF)

Hydrogen bond acceptor - ANSWER The atom of a hydrogen bond which
does not supply the hydrogen atom

Rate of breaking and forming hydrogen bonds in water - ANSWER 1-20
picoseconds

Average hydrogen bonds per water molecule - ANSWER 3.4

Hydrophobic effect - ANSWER The ability of water to push together nonpolar
molecules. Due to increase in entropy.

Covalent bond - ANSWER Bond between atoms that share electrons

Hydrophilic molecules - ANSWER Molecules that interact with polar solvents
such as water

Hydrophobic - ANSWER Molecules with little or no H-bonding capacity,
nonpolar

Amphipathic - ANSWER Molecules that are both polar and non polar

Micelles - ANSWER Clusters of amphipathic lipids

Acid - ANSWER Any compound that can donate protons

Kw of water at 25°C - ANSWER 10^-14 M⁻¹

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