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Rhythmic fluctuations in the abundance and activity of cell-cycle control molecules pace the events of the cell cycle. • Kinase - a protein which activates or deactivates another protein by phosphorylating them. • Kinases give the go-ahead signals at the G1 and G2 checkpoints • The Kinases that drive these checkpoints must themselves be activated o The activating molecule is a cyclin, a protein that derives its name from its cyclically fluctuating concentration in the cell o Because of this requirement, these kinases are called cyclin-dependent kinases, or Cdk's
Explain Receptor Proteins These are built into the membrane of a nerve cell and they detect chemical signals released by other nerve cells. Receptor proteins are involved in
What is gastrulation? How during gastrulation are the first two germ layers formed? What are these germ layers? Gastrulation is the process by which a portion of the blastula w
The synthesis of the three fundamental polymers of life, DNA, RNA and protein, is template-directed. This means that - Answer A. the monomers are assembled one by one in a sequence
Q. Can you briefly explain about parasitism? The Parasitism is an inharmonious interspecific ecological interaction in which individuals of a species (the parasites) explore or
Person Z swallowed a large amount of substance X and, as a result, has convulsions (abnormal violent contractions of skeletal muscles). Swallowing which of the following substance
Cobalt deficiency The deficiency of cobalt is more commonly seen in ruminants fed on diets deficient in this essential micronutrient. Cobalt is stored only in limited amounts
Explain about Suspensions Sol is a colloidal system, in which solid particles are dispersed in a liquid. When the particles of a solid are separated into large aggregates of pa
What is crossing over? How is meiosis related to this phenomenon? Linked alleles, for instance, A-b and a-B, form the gametes A-b and a-B that maintain the linkage of the allel
Define about the term Indicators? The easiest way to determine when the reaction is complete is by using indicators. An indicator is a compound that has a physical property (us
Retention of Soil Moisture The movement of water into and within the soil, moisture storing capacity of soils and the availability of moisture to plants are governed by soil pr
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