Between fertilization and the first cleavage division, actin filaments pull the cytoplasm of the frog egg toward the point of sperm entry in a process called:

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#Question id: 2655

#SCPH05 I Biotechnology

Lac Operon will be turned on when

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#Question id: 15726

#SCPH28 | Zoology

Tissues and cells cultured in a liquid medium produce culture of single cells and cells clumps of few to many cells

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#Question id: 15149

#SCPH01 Biochemistry

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, what will be the phenotype in F1 progeny?

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#Question id: 1417

#SCPH28 | Zoology

Which of the following triggers apoptosis?

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#Question id: 1573

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

Which cells and which signaling molecules are responsible for initiating an inflammatory response?