BIO 2533 Lecture 10: 6. BIO2533-Chapitre10A

Are the following correct?

1. Which type of lipids do not make up a membrane?

a. Triglycerides <--

b. Glycerophospholipids

c. Sphingolipids

d. Chloesterol

2. A lipid bilayer becomes a membrane with the addition of _____.

a. Polar heads

b. Hydrophobic tails

c. Cholesterol

d. Proteins <--

3. A transporter protein has to have how many polar regions (minimum) on a hydropathy plot?

a. 3

b. 1-2 <--

c. 4

d. 0

4. Molecule X goes down its gradient molecule Y goes against its gradient using the same transporter. This is an example of ___ and ___ if they are both entering the cell.

a. Active, antiport <--

b. Active, symport

c. Facilitated, antiport

d. Facilitated, symport

5. Facilitated and active transport have all in common except _____.

a. Sigmoidal graphs

b. Ability to find Km

c. The use of ATP <--

d. Higher rates compared to diffusion

1. The four nucleotides found in human DNA (G, A, T, C) combinein groups of three to create potentially 64 different amino acids,but only 20 amino acids, one start codon and three stop codons areused to construct proteins. Why is this so?

a.Many amino acids are not considered complete until they bindwith a second amino acid.
b.64 amino acids are produced, but the body only integrates
c.42 of them into proteins. 64 amino acids are initially produced,but 42 of them are unstable and degrade immediately. Differentd.nucleotide combinations code for the same amino acid.

2.What term is used to describe the phenomenon that there are 64different groups of 3 nucleotides to code for amino acids but only20 amino acids, 1 start codon, and 3 stop codon used in proteinconstruction.

a.Crossing over
b.Redundancy
c.DNA structure
d.Transcription

Suppose a male and a female with chromosomes "DD" (male) and"dd" (female) crossbreed. How likely is their offspring to exhibitthe DD genotype?

100%
25%
50%
0%

4.What term best describes the genotype of "dd"?
a.heterozygous
b.monohybrid
c.homozygous
d.haploid

5.Suppose a male and a female with chromosomes "DDBb" (male) and"ddBB" (female) interbreed. How likely is their offpsring toexhibit the DdBb genotype? 100% 50% 25% 0%?

6. What term best describes the breeding perfomed when a maleand female with chromosomes "DDBb" (male) and "ddBB" (female)interbreed?

Dihybrid cross

Codominance

Incomplete dominance

Monohybrid cross

A study was carried out by the cancer registrar regarding theage at initial diagnosis of patients diagnosed with lung cancer. Atotal of 80 cases were recorded as follows: Ages: 85 83 82 81 80 8078 76 75 75 74 74 73 73 72 72 72 71 71 70 70 70 70 69 68 68 67 6767 67 66 66 66 66 66 65 65 65 64 64 63 63 63 62 62 61 61 61 60 6059 59 59 58 58 57 57 57 56 56 55 55 53 53 52 51 49 49 48 47 46 4545 44 42 40 39 38 35 29 Calculate: a. Range b. From an ungrouped(intervalsize1) distribution, calculate: (1) mean (2) median (3)mode (4) variance (5) standard deviation