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BIOS 100 Chapter 2
- Saturated fatty acids have than unsaturated fatty acids,
which is why they exist as a at room temperature.:
Answer fewer doublebonds; solid
2. Enzymes are composed of:
Answer amino acids.
3. A complex polymer built of monosaccharides is called a(n):
Answer polysaccharide.
4. Enzymes:
Answer lower the amount of activation energy needed for a reaction to takeplace.
5. Which of the following nucleotide bases are present in equal amounts inDNA?:
Answer adenine and thymine
6. An amino acid is to a polypeptide as:
Answer a nucleotide is to a nucleic acid
7. Which type of macromolecule is an informational molecule?:
Answer DNA
8. The principal components of cell membranes are:
Answer lipids.
9. DNA is made of:
Answer nucleotides.
- Why do coastal areas have milder, less variable climates than inland areas?: 1 / 2
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Answer Large bodies of water, especially oceans, can absorb huge amounts of heatfrom the sun during warm times of the year, reducing temperature increases on theland. Similarly, during cold times of year the ocean slowly cools, giving off heat thatreduces the temperature drop on shore.
11. Water molecules form which type of bond with other water molecules:
Answer hy-drogen bonds
12. is the smallest chemical unit of a type of pure substance.:
Anatom
13. All matter on earth, both living and non-living, is made up of:
Answer atoms.
- In DNA, adenine from one strand binds to in the
complementarystrand, while in RNA, adenine pairs with .:
Answer thymine, uraci
- Pure water and aqueous solutions that are neither acidic nor basic are saidto be:
Answer neutral.
16. An element:
Answer is a substance that cannot be broken down chemically into anyother substance.
- The tendency of molecules to stick together, called cohesion, is strongerin water than in
other liquids because:
Answer the polarity of water allows a hydrogenatom from one water molecule to form a hydrogen bond with the oxygen atom of another water molecule.
18. The secondary structure of a protein refers to:
Answer the twisting of the amino acidchain into a corkscrew-like shape or into a zigzag folding pattern.
19. A partial sequence of a molecule is "AACTGCT." The molecule is:
Answer a nucleicacid.
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