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#Question id: 12583

Which of the following is caused by excessive nutrient runoff into lakes?  

#SCPH06 I Botany
  1. Depletion of atmospheric ozone 
  2. Turnover
  3. Biological magnification 
  4. Eutrophication
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TLS Online TPP Program

#Question id: 2973

#SCPH06 I Botany

Following statements are regarding to the spindle position checkpoint pathway in budding yeast.

A. During interphase and early mitosis, Cdc14 is sequestered and inactivated in the nucleolus. Inactive Tem1-GDP associates with the spindle pole body (SPB) nearest to the bud as soon as the mitotic spindle forms.

B. If chromosome segregation occurs properly, extension of the spindle microtubules inserts the daughter SPB into the bud, causing Tem1 to be activated by an unknown mechanism.

C. Tem1-GDP activates a protein kinase cascade, which then promotes the release of active Cdc14 from the nucleolus and exit from mitosis.

D. If the spindle apparatus fails to place the daughter SPB in the bud, Kin4 (cyan), an inhibitor of Tem1, is recruited from the parent cell cortex to the parent-cell-located SPB and maintains Tem1 in the GTP-bound form, and mitotic exit does not occur.

Which of the following are correct?
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#Question id: 3056

#SCPH05 I Biotechnology

Ten bacteria were inoculated into a rich medium. If at the end of ten hours the total number of cells is 10^4, then the number of elapsed generations and the generation time respectively is
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#Question id: 14159

#SCPH05 I Biotechnology

Which of the following statement is not a benefit of FASTA over BLAST?
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#Question id: 2268

#I Life Science/ Life Sciences Group – I-V

Within chloroplasts, light is captured by
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#Question id: 15150

#SCPH12 I Genetics

In this problem we will explore some of the many ways that mutations in two different genes can interact to produce different Mendelian ratios. Consider a hypothetical insect species that has red eyes. Imagine mutations in two different unlinked genes that can, in certain combinations, block the formation of red eye pigment yielding mutants with white eyes. In principle, there are two different possible arrangements for two biochemical steps responsible for the formation of red eye pigment. The two genes might act in series such that a mutation in either gene would block the formation of red pigment. Alternatively, the two genes could act in parallel such that mutations in both genes would be required to block the formation of red pigment.
Further complexity arises from the possibility that mutations in either gene that lead to a block in enzymatic activity could be either dominant or recessive. If the crosses is made between a wild type insect with red eyes and a true breeding white eyed strain with mutations in both genes. Such considerations yield the Pathways in series with recessive mutations in both genes, the F1 progeny shows will have red eye, what is the expected phenotypic ratio of red to white eyed insects in the F2.