Brownian movement - Study guides, Class notes & Summaries

[Brock University] BIOL 1P91 Midterm Exam Questions And Answers The smallest functional unit in living organisms - ANS Atoms The three subatomic particles - ANS protons, neutrons, electrons Where the neutrons and protons are found - ANS The atomic nucleus What was Rutherford's experiment? - ANS A fine beam of positively charged alpha particles (helium nuclei) was aimed at an extremely thin sheet of gold. A zinc sulfide screen was used to detect any alpha particles that pa...

DAT BIOLOGY Exam Questions With Verified Answers. Cell Theory: - answer1. all living things are composed of cells 2. cell is the basic fundamental unit of life 3. chemical reactions of life take place inside the cell 4. cells arise from pre-existing cells 5. cells carry genetic information in the form of DNA - passed from parent to daughter cell nucleolus - answer- dense structure in the nucleus where ribosomal RNA synthesis occurs Endoplasmic Reticulum - answer- network of membrane- enc...

Brownian motion the movement of molecules powered by random fluctuations of environmental energy Brownian motion of what molecule initiates many biochemical interactions? water Is water polar or non polar? polar Polarity enables what type of. bonding between H2O molecules? hydrogen bonding Polarity of water accounts for what? the cohesiveness of water and its ability to dissolve many biochemicals. Hydrophobic effect Inability of water to dissolve nonpolar molecules Electrostatic intera...

ITEC Beauty Specialist - Skincare & Eye Treatments Questions and Answers Already Passed A birthmark is also known as; Naevae A moisturizing cream is best suited to what skin type? Mature A moisturizing lotion contains; 15% oil A natural astringent Lemon juice Alpha-tocopherol is the chemical name for; Vitamin E Ascorbic Acid is the chemical name for; Vitamin C Atom that gained an electron will become _________ charged negatively Atom that has donated an electron becom...

4 key biomolecules of life correct answers proteins, nucleic acids, lipids, and carbohydrates weak bonds correct answers hydrogen bonds and van der Waals interactions. allow for dynamic interactions and permit energy and information to move about the cell and organism hydrophobic molecules correct answers fats and steroids in which they repel water, they cannot interact with water at all. Brownian motion correct answers the chaotic movement of colloidal particles, caused by collision wi...

chloroplasts - -contain the pigment chlorophyll -chlorophyll absorbs red, blue, & violet light ATP - -used to transport E around cells -chemical E stored in the bonds -important bonds between 2nd and 3rd phosphate group -going to lower energy state breaks bonds and releases the energy each molecule during diffusion - -moves randomly -behavior unpredictable -each individual molecule never stops moving dragon fly size - -high O2 levels in carboniferous allowed them to grow big -later in ...

Coliforms are a subgroup of enteric bacteria classified by their ability to ferment which sugar? - lactose A Durham tube is included in the LT broth tubes to detect ___, a byproduct of lactose fermentation. - gas production ___ is an enzyme that degrades starch. - Amylase ___ is an opportunistic pathogen that commonly causes staph infections. - Staphylococcus aureus A clear area due to lysis by a phage in a lawn of host cells is called a(n) ____. - Plaque A confluent growth of cells in th...

true motility Correct Answer-directed motion of bacteria (energy expenditure by the cell) brownian movement Correct Answer-random back-and-forth jiggling motion due to collisions of water molecules with the cells (cells don't go anywhere)... results from kinetic energy of molecules around the cell flagella Correct Answer-long, whip-like structures that extend beyond the surface of the cell and glycocalyx and propel the cell through its environment. Composed of flagellin serovars Correc...

Convulsions a sudden, violent, irregular movement of a limb or of the body, caused by involuntary contraction of muscles Hyponatremia - causes? Hyponatremia is a condition that occurs when the level of sodium in your blood is abnormally low. Sodium is an electrolyte, and it helps regulate the amount of water that's in and around your cells. Red Cell Crenation A process resulting from osmosis in which red blood cells, in a hypertonic solution, undergo shrinkage and acquire a notched or scallop...

BOT3015 EXAM 3 Marking Scheme 2024 100% Correct Brownian movement - Answer- molecules /ions in constant random motion Diffusion - Answer- movement of molecules or ions from region of higher concentration to region of lower concentration Molecules that are moving from a region of higher concentration to a region of lower concentration are said to be moving ______________________________ - Answer- Along a diffusion gradient molecules moving from regions of low to high concentration are sai...