Bio 2 (Nearpod + crit thinking)

How many bonds? G-C A-T

3 bonds 2 bonds (*GCi is 3 letters)(3 bonds)

A phospholipid ______. a) has both polar and nonpolar regions b) is made up of a triglyceride bonded to a phosphate group c) is a building block of ATP d) can donate both cations and anions in solution

a) (*cuz amphipathic=hydrophilic + hydrophobic) (*polar = water)(so loves water) (*nonpolar=no water)(repell water) (*phopholipid = head + tail) (*polar = head)(likes water so faces it outwards) (*nonpolar = tail)(hydrophobic)

Two molecules containing the same types and numbers of atoms but different bonding sequences are called a) isomers b) monomers c) polymers d) enantiomers

a) (*iso=equal) (*equal # + type atoms) (*dif bonding seq=dif arragnement) (*-mer=structure)

Amino acids can be distinguished from one another by a) the chemical properties of their R group b) the type of bond between the R group and the rest of the amino acid molecule c) the chemical properties of their amino and carboxyl groups d) all of the above

a) (*only R group differs) (*others don't matter) (****focus on right info)

Starch, glycogen, and cellulose, are examples of a) monosaccharides b) polysaccharides c) lipids d) proteins

b)

By definition, carbohydrates contain which elements? a) carbon and phosphorus b) carbon, hydrogen, and nitrogen c) carbon, hydrogen, and oxygen d) carbon and oxygen

c) (*carbo=carbon) (*hydrate=water) (*water=hydrogen + oxygen)(H2O) (*carbohydrate=carbon + hydrogen + oxygen) (*C + H2 + O) (*carbohydrate=sugar) (*glucose=C6H12O6) (*also alcohol = CH2O)

If 30% of the bases within a DNA molecule are adenine, what is the percentage of thymine? a) 20% b) 25% c) 30% d) 35%

c) (*cuz A-T pairs together)

A major type of lipid found in cell memb is a) steroids b) triglyceride c)phospholipid

c) (*phospholipid bilayer=memb)

Which of the following is not found within DNA? a) thymine b) phosphodiester bonds c) complementary base pairing d) amino acids

d) (*protein)

Protein denaturation implies the loss of which structure of protein? a) primary b) secondary c) tertiary d) B and C e) all 3 sturctures

d) (*secondary + tertiary = bonds...folds) (*denaturation=melt bond) (*cuz defolds) (*acids, base, temp, chem---> melt bonds)(unfold)

What condition must a phospholipid cell memb be?

fluid + solid (*certain fluidity)(but not too watery)

bond that allows protein to fold bond that keeps protein atoms together in a strand

hydrogen peptide

Does denaturation affect a primary protein form?

no (*denaturation=break hyd bonds) (*primary=no hyd bonds)(cuz no folding) (*only peptide bonds whcih keep protein as a protein)

What bond is stronger: peptide or hydrogen?

peptide (*hydrogen=fold) (*hydrogen=breaks during denaturation) (*peptide=stays intact)(to keep protein as a protein strand)

Given protein form, what bond? primary secondary tertiary

peptide hyd hyd

using heat or acid/base to break hydrogen bonds in a protein

protein denaturation

cell memb: more ______ fat = more solid more ______ fat = more liquid

saturated unsaturated

At a higher temp, is the cell memb more saturated or unsaturated? How about in normal temp?

saturated unsaturated (*hi temp=makes memb too liquidy) (*so need more solid to keep it from melting away) (*keeps fluidity balanced this way) (*prevent memb from being too fluid)

Why is DNA w/ more GC harder to denature than one w/ lower GC?

strongly bonded (*GC=3 bonds)