Lifesci - Study guides, Class notes & Summaries

Define diffusion Which 4 factors does it depend on? What are the 2 components of random motion? - answer-diffusion: random/non-directed motion of molecules and small particles in a liquid factors: 1) driving force (i.e. gradient, temp.) 2) mechanical resistance of the surrounding medium 3) structural properties of the molecule 4) active forces causing non-thermal fluctuations (i.e. contraction/relaxation of cytoskeleton moves cytoplasm causing active diffusion) components of random moti...

LIFESCI 2G03 Questions and Answers Test 1 mutation - Answers a change in the DNA sequence germline mutation - Answers heritable, occurs in germ-line cells, and is passed on/present in all cells of the progeny somatic mutation - Answers non heritable, does not occur in germ-line cells, is not passed onto progeny, is passed onto all descendants of that cell what regions of the DNA are affected by germline and somatic mutations, respectively? - Answers both types of mutations may affect the pro...

Solutions to Homework 6 LS30B-2 Due February 27, 2017 6.2 FE 5 Carry out the following matrix multiplications. For each problem, say what the function represented by each matrix does to the standard basis vectors and what the product of the two matrices would do to these vectors. a. = b. = c. = Multiplying any matrix in 2-D by vector [1,0] gives the first column of the matrix and multiplying it by a vector [0,1] g

Homework 5 Solutions Next State Contribution from Cn Contribution from Sn Contribution from An Cn+1 0 (Since cubs only remain cubs for a year, none of the cubs from the current year will remain as cubs for the next year) 0 (Since no subadult from the current year will become cubs for the next year) 0.5 (Since on average, adults give birth to 0.5 female cubs each year) Sn+1 0.83 (Since cubs only remain cubs for a year, all of the cubs from the current year will become t...

Homework 2 Solutions Rubric 4 problems were graded in the following scale for a total of 10 points. 4.1.Exercise 7: (2 points) • 2 points: Have 3 graphs (Trajectory + Time Series for both V and X) AND a description of the trend of the graph as the value of a changes • 1 point: Either the description is missing or one of the graphs is missing • 0 point: Blank answer 4.1.Further Exercise 2: (2 points) • 2 points: Able to state that the trajectory will never reach the limit cycle...

LS 30B: MATHEMATICS FOR LIFE SCIENTISTS WINTER 2018 - LECTURE 2 Jukka Keranen MIDTERM SOLUTIONS Your Name The Last Six Digits of Your Student ID number Your TA Section By signing below, you confirm that you did not cheat on this exam. No exam booklet without a signature will be graded. INSTRUCTIONS • Please do not open this booklet until you are told to do so. • Your cell phone must be turned off completely and stowed away where you cannot see it. • In addition to basic writing ...

Homework 2 Solutions Exercise 4.2.FE 1 Some people have difficulty maintaining a stable weight. Instead, they gain a lot of weight, go on a diet, lose the weight, but then gain it back. This pattern is sometimes referred to as yo-yo dieting. a) What kind of feedback loop is involved in this situation? b) Use your understanding of feedback loops and oscillations to suggest what might help such a person to stabilize their weight. Part a: Negative Feedback Loop (since a gain in weight will ...

Solutions: 5.1.2: Choose an initial value for X and use values of r that are less than, greater than, and equal to one to test the above statements by computing two values of X for each value of r. Solution: Choose X0 = 1, r = 1: X1 = 1 ∗ 1 = 1, X2 = 1 ∗ X1 = 1 ∗ 1 = 1. r = 2: X1 = 2 ∗ 1 = 2, X2 = 2 ∗ 2 = 4. r = 1/2: X1 = 1 2 ∗ 1 = 1 2 , X2 = 1 2 1 2 = 1 4 . 5.1.3: An inedible alga is growing on a pond in a city park. Only a small part of the pond is now cove...

Lifesci 2L03 Poll Questions and Answers 100% Pass True or False: Our body's cells and tissues all age (i.e. regenerate) at the same rate. - Answers False Which of the following is NOT a genetic hallmark of aging? 1. Genomic Stability 2. Cellular Senescence 3. Telomere Attritions 4. Epigenetic Alternations - Answers 2. Cellular Senescence True or False: Rates of bodily aging vary from person to person. - Answers True True or False: Someone who is of advanced age should also be identifi...