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2024 BIO 101 EXAM 1 WITH CORRECT ANSWERS
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2024 BIO 101 EXAM 1 WITH CORRECT ANSWERS
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2024 BIO 101 EXAM 1 WITHCORRECT ANSWERS
What is Biology? - CORRECT ANSWERS-Study of life; encompasses everything
-biomolecular biology and technology have brought around a new era for
biology
What are the major characteristics of Life? - CORRECT ANSWERS-1)
reproduction (DNA (deoxyribose nucleic acid); double helix shape; stores
genetic info)
2) cellular repsiration (used to creat energy) (metabolism; need it to perform
basic functions of life; food (carbs, proteins, lipids/fats, vitamins/minerals)
3) adaptation/evolve (over large periods of times traits of organizations)
modified
4) growth and development (DNA lays out the "plan")
5) organization (very specific; organization of organs/structure)
6) cells (basic building blocks of life; need only one to be considered living)
7) respond (response to stimuli (light, touch, heat, etc.); need in order to
survive)
Structure of Proteins - CORRECT ANSWERS-- very complex structure
- different order of structure based on a hierarchy
1) primary structure: just amino acids connected in one strand (like a
ribbon)
2) secondary structure: folding/ coiling; strengthns a whole lot (ie spider silk)
3) tertiary structure: taking secondary "coil" and folding all over the place
4) quaternary structure: only 1 protein with more than one chain of amino
acids (ie hemoglobin)
Lab Time with Proteins - CORRECT ANSWERS-- indicator solution: biuret
reagent
- stains peptide bond
- positive test: blue to a darker purple
- good qualitative test
- protein: BSA
Graphind Data and Standard Curves - CORRECT ANSWERS-- independent and
dependent variables
- standard curve
1) have to know concentration to plot against unknown substance
, 2) read absorbence (how much light a substance can absorb)
- colorimeter: tool that shows absorbence of light (measures the
transmitance of light)
- pass light through substance
- darker the solution; greater absorbance
- lighter the solution; less absorbance
- test amount of absorbence in the amount of protein of a substance
(independent= protein; absorbance= dependent)
What is a cell? - CORRECT ANSWERS-- basic building blocks of life
- not always apparent; first seen with a microscope
- cells were discovered by Hook in 1655
- first cells discovered were from cork
- theory wasn't generally accepted due to the challenge of trying to convince
people of this drastic change
What is cell theory? - CORRECT ANSWERS-- proposed in 1800's
- lowest level of structure perfoms all chracteristics of life
- arise from previously existing cells
What is metabolism? - CORRECT ANSWERS-- energy breakdown; needed for
food
- glucose is the "best"
- C6H12O6 (formula for glucose)
- breaks (catabolic reaction) down to carbon dioxide and water [ CO2 + H2O]
Difference between anabolic and catabolic reactions? - CORRECT ANSWERS--
anabolic- building up of molcules, etc.
- ie: anabolic steroids (build up muscle)
- catabolic- breaking down of molecules
Bean Beetle Lab - CORRECT ANSWERS-- learn how to determine if alive or
dead
- if alive, beetles should be giving off carbon dioxide
- if dead, bean beetles may be giving off CO2 but only
because the decomposition process
- CO2 measured in ppm
- calculate amount per bean beetle
x (ppm)/ number of bb = ppm/bb
every 15 mins = [x / # of bb] / 15
every 1 hour = [x/ #of bb] x 4
every sec = [x / # of bb] / 60
- used loggerpro prgm; used CO2 probe
Are viruses alive? - CORRECT ANSWERS-- depends on what you argue
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