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TLS Online TPP Program

#Question id: 2841

To duplicate a chromosome, at least half of the nucleosomes on the daughter chromosomes must be newly synthesized. But histone proteins as new and old occupies strands differently as

#Unit 2. Cellular Organization

  1. New modified histones will tend to rebind one of the parental chromosomes at a position near their previous position on the parental chromosome

  2. Only new unmodified histones will tend to rebind one of the daughter chromosomes at a position near their previous position on the parental chromosome

  3. Old unmodified histones will tend to rebind one of the parental chromosomes at a position near their previous position on the parental chromosome

  4.  Old modified histones will tend to rebind one of the daughter chromosomes at a position near their previous position on the parental chromosome

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TLS Online TPP Program

#Question id: 3340

#Unit 11. Evolution and Behavior

Which of the following statements is NOT correct regarding effect of genetic drift?
TLS Online TPP Program

#Question id: 26480

#Unit 2. Cellular Organization

Optimal length of prokaryotic promoter should be
TLS Online TPP Program

#Question id: 4765

#Unit 8. Inheritance Biology

The recessive mutant allele that causes cystic fibrosis is much more frequent in Caucasians population than in other world populations. Some scientists believe heterozygotes must have had a survival advantage during plagues such as cholera that occasionally swept through this population. What concept does this illustrate?
TLS Online TPP Program

#Question id: 23150

#Unit 13. Methods in Biology

How fura-2 dye moves inside the cell through plasma membrane?
TLS Online TPP Program

#Question id: 365

#Unit 1. Molecules and their Interaction Relevant to Biology

Water is a polar molecule: the oxygen atom with its unshared electrons carries a partial negative charge (δ−) of ___________, and the hydrogen atoms each carry a partial positive charge (δ+) of __________, where e is the charge of the electron.