Biology 120 – Chapter 1 Lecture Notes with Complete Solutions – Introductory Biology Course Material (University Level)

Bio 120 Lecture Exam 1-Answered
Catabolic reactions? - ANSWER-- Food particles→ macromolecules (carbs, lipids, etc.)
→ Monomers (glucose, amino acid, fatty acids, glycerol, etc)

Cholesterol? - ANSWER-- LDL- low density lipoprotein
- HDL- high density lipoprotein

Do anabolic reactions build things up or down? - ANSWER-- build things up

Do proteins have functions? - ANSWER-- LOTS of functions

Does the hydrophilic head attract or repel water? - ANSWER-- attract water

Does the hydrophilic tail attract or repel water? - ANSWER-- repel water

Genetic Information - ANSWER-- 1 of the characteristics of life
- All living things contain genetic info that determines traits and pass on to offspring
- DNA->RNA->Protein
- Sexual or asexually

Growth and Development - ANSWER-- 1 of the characteristics of life
- All living things grow and develop through characteristic life cycle

Heterotroph - ANSWER-- (hetero=different) 1) consume food 2) Food Metabolized 3)
Cell resp. Of fermentation occur to release energy

Hierarchical Levels - ANSWER-

Hierarchical organization - ANSWER-- 1 of the characteristics of life
- Molecular cell level
- Organism level
- Ecological level
- Individual->population->community->ecosystem->biome->biosphere

How can a scientist increase the reliability of an experiment? - ANSWER-Using reliable
sources for background information
Peer reviewed articles from journals
Large sample sizes
Variety of data (qualitative and quantitative)
Repetition of experiment
Blind studies which help to reduce bias (single blind or double blind)

How do we know if something is alive? - ANSWER-

, How small is a cell? - ANSWER-- Must use microscope
- Not all cells look the same

Hypotheses - ANSWER-Must be SPECIFIC
Must be TESTABLE
Must be FALSIFIABLE
We can NOT prove a hypothesis 100% true, but we can gather enough data to support
it so that it can be accepted

Law - ANSWER-- Explanation of how something works, a description of consistent
physical patterns or relationships in nature
- Usually math based and involve a formula
- Well tested

law = ________________ - ANSWER-- ______how________

Life Cycle - ANSWER-

Molecular/Cellular Organization - ANSWER-- 1 of the characteristics of life
- All living things are made up of cells
- Levels of Organization: cell->tissue->organ->organ system->organism
- Everything has a place and it is organized

Obtain and Use energy - ANSWER-- 1 of the characteristics of life
- How? Make own food or consume energy
- We use energy for life processes

Organism - ANSWER-- any living thing???????????

Reproduction - ANSWER-- 1 of the characteristics of life
- All living things make and produce more of themselves through reproduction

Response to Environment - ANSWER-- 1 of the characteristics of life
- All living things interact and respond to their environment
- Ex: plant bending/growing towards the light

Scale - ANSWER-0-6 (acid) 7 (neutral) 8-14 (basic)

Sexual Reproduction - ANSWER-- 2 parents, sperm and egg, plants, animals

Statistically significant - ANSWER-- Results very unlikely due to chance difference
between the experimental and control groups; results likely represent a true difference

THEORIES DO NOT TURN INTO LAWS - ANSWER-