BIO 101 Exam 1 Questions And Answers Rated A+.
What is Biology? - correct answer. 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 answer. 1) reproduction (...
What is Biology? - correct answer. 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 answer. 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)
What is a cell? - correct answer. - 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 answer. - proposed in 1800's
- lowest level of structure perfoms all chracteristics of life
- arise from previously existing cells
What is metabolism? - correct answer. - 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 answer. - anabolic-
building up of molcules, etc.
- ie: anabolic steroids (build up muscle)
- catabolic- breaking down of molecules
Bean Beetle Lab - correct answer. - 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 answer. - depends on what you argue
- relies on a host cell to reproduce
What is science? - correct answer. - latin "to know"
- asking questions about nature
- believe questions can be answered
Steps of the Scientific Method - correct answer. 1) Make an Observation
2) Ask a question
3) Form a Hypothesis ("if, then" statement)
- accept (agree with conclusions)
- reject (disagree, continue testing)
4) Exeperimental Design/ testing
5) Form a conclusion
Control in a experiment - correct answer. - must always have a control
- does not have variables
- does not change; will not be affected
What is a scientific theory? - correct answer. - not just an explanation for something
- has been developed/tested/scrutinized/challenged/ reviewed, etc.
- generally accepted by whole scientific community
- ie: theory of gravity, atomic theory of matter
pH - correct answer. - measures acids and bases
- scale from 0-14
-acids ( H+ ions): range from 0-6/7
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