Biology: The Science of Life Chapters 1-3
In a dehydration reaction, ____. In order for this to occur water is ________.
monomers are joined to become a polymer; removed
Carbohydrates are classified as
monosaccharides• disaccharides• polysaccharides
The process of ________leads to organisms that are ________that environment
natural selection; adapted to
Alpha helix and beta pleated sheet are characteristic of
secondary structure in proteins.
dehydration synthesis
A chemical reaction in which two molecules covalently bond to each other with the removal of a water molecule.
hydrolysis reaction
A chemical reaction that breaks apart a larger molecule by adding a molecule of water
Male amphibians, including frogs and toads, have been plagued by feminization, deformity, behavioral abnormalities and sterility. Biologists from the University of Florida investigated whether reproductive problems among populations of cane toads (Bufo marinus) are caused by poisons from chemicals associated with agriculture. The biologists collected local adult cane toads from more than 20 different locations. Toads were collected from areas close to agriculture, both large-scale and small-scale farms, as well as from suburbs that are nonagricultural areas. Which of the following statements would be the best hypothesis for this study?
Agricultural chemicals can cause deformities and feminization amongst cane toads
Four categories of biological molecules
Carbohydrates• Lipids• Proteins• Nucleic Acids
Photosynthesis
Carbon dioxide + water -> glucose + oxygen
deoxyribonucleic acid
DNA - stores genes - sugar - ATCG
Steriods
Do not contain fatty acids but are insoluble in water and are derived from cholesterol
ribonucleic acid
RNA - make proteins - sugar - single - UT
Unsaturated fats have double bonds in the carbon chain
Saturated fatty acids have no double bonds between carbon atoms
Properties of water
Solvency• Cohesion and adhesion• High surface tension• High heat capacity• High heat of vaporization• Varying density
Plants store glucose in the form of
Strach
Which of the following property of water helps an individual who is exercising vigorously maintain a constant body temperature?
Water has a high heat capacity
hydrogen bond
When a positively charged hydrogen in a water molecule become attracted to the negatively charged oxygen in a nearby water molecule
Community
When populations of different types of organisms interact in a given area
Four elements make up about 96% of the body weight of most living organisms
carbon, hydrogen, oxygen, and nitrogen
Hydrocarbons
chains of carbon atoms bonded only to hydrogen atoms
An atom's valence electron shell
determines its chemical reactivity.
Animals store glucose as
glycogen
When water changes from a liquid to a gas
hydrogen bonds are broken between neighboring water molecules
Isomers
same number and kinds of atoms in a variety of arrangements