Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
1. One condition that seems to lead to senescence and not apoptosis in stem cells is:
a. shortening of telomeres below a critical limit b. base damage to DNA c. unequal division of chromosomes at anaphase d. none of the above 2. Knowing that even in the oldest people's stem cells seem to have many cell divisions left to them when cultured in vitro (in a dish), the you might contend that a possible reason for that was: a. Absence of inhibitory factors found in the old bodies in the new culture medium b. factors in the cellular environment of old people's bodiesc. The presence of high levels of growth factors in the culture serum d. All of the above 3. In 1962, Leonard Hayflick conducted an experiment that supported Weismann's Theory of programmed death. He proposed The Hayflick Limit which can be reached faster by:
a. Increasing the rate of cell division b. Underfeeding cells c. Decreasing the rate of mutations d. Synthetically elongating telomeres. 4. The antagonistic pleiotropy theory of aging assumes that each gene has only one effect on the phenotype of an organism at different stages of its life. True or False 5. In Conboy's study on heterochronic parabiotic pairs, which phrase described what future studies should focus on according to the results of this study?
a. adult stem cells b. changes in aging cells c. muscle cell regeneration d. changes in aging plasma
WHen looking at the observed and expected double cross over frequencies, what does it mean if you calculate a negative interference and what does it mean when you calculate a positive interference
What is Mendel's first principle? In your answer give anexample of a cross that led Mendel to this explanation.
By some estimates there are only a couple of thousand great white sharks alive in the wild. Assume that in the frequency of LDH alleles in a sample of 200 adult sharks in a population off of Australia.
Think about a strain of E. coli that contain a mutation in the gene encoding the IIA protein of the phosphotransferase system.The transport of glucose is not affected by this mutation;
Using the physical relationships described in the Hagen-Poiseuille equation, explain to this patient why his body might try to compensate for the increased resistance in his occluded coronary arteries by an increase in his blood pressure.
Hershey and Chase experimented with radioactively labeled phosphorus and sulfur to determine that DNA and not protein is the genetic material.
Cytosolic Ca2+ concentrations typically rise about 50-fold when Ca2+ channels open in the plasma membrane. Assume that 1000 Ca2+ channels open in a cell with a volume of 1000 µm3 and an internal Ca2+ concentration of 100 nM.
q1. if animal essential to store energy for long term use but not be encumbered with weight of extra tissue which is
summarize the main events that occur in interphase, prophase, metapagse, anaphase and telophase.
This problem refers to the MN and ABO loci mentioned in class. It also refers to the Rh locus, which is responsible for the positive or negative part of the blood type.
Under what conditions does one observe a 9:3:3:1 ratio? A 1:1:1:1 ratio? Which laws proposed by Mendel are supported by these ratios? Why? Consider a trihybrid self cross AaBbCc X AaBbCc.
A force F = 200i - 400j + FZ k N, is acting through point A(0,0,0) m. If F creates a moment component of -3000 Nm in the direction of a line passing from point B (2,4,5) m to point C(-3,6,8) m, determine the value of FZ.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd