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In the eukaryotes replication of chromosomal DNA happens only in the S phase of the cell cycle. As for bacterial DNA, eukaryotic DNA is replicated
figure: The eukaryotic cell cycle. The S point is typically 6-8 h long, G2 is a point in which the cell prepares for mitosis and lasts for 2-6 h, mitosis itself (M) is short and takes only about 1 h. The length of G1 is very variable and depends on the cell type. Cells can enter G0, aquiescent phase, instead of continuing with the cell cycle.
Q How do amoebae, paramecia and trichomonas respectively move? Amoebae move by amoeboid movements small invaginations and projections of their plasma membrane (pseudopods) that
How do you determine if a molecule is polar or non-polar? A polar molecule is a molecule that has a net dipole moment because of its having unsymmetrical polar bonds
What are the three periods into which interphase is divided? Interphase is the preceding phase to the mitotic division. It is separated into three periods, G1, S and G2 (the l
Describe the concept of gastrulation? During embryological development this stage results in blastulas conversion into a gastrula. Cells migrate toward the inside of embryo fro
Define the effect of SCFA on Sodium Absorption? SCFAs (short chain fatty acids) have a stimulatory effect on sodium absorption from colonic lumen. The unionized SCFA crosses th
FUNCTION S OF POLYSACCHARIDES Chitin is a structural component of fungal cell wall and exoskeleton of insects, crustaceans and some other arthropods. Peptidoglycan o
Illustrate about the primary minerals The minerals originally formed when once -heated magma (molten rock) cooled and formed solid igneous rocks (explained below) are called as
Recurrent Type In this type, euspory (seen in normal cases) is replaced by aneuspory (Diplospory) because of irregular meiosis. When the spore mother ceIl functions directly
Tr aumatic reticuloperitonitis (TRP) It is also known as traumatic gastritis, hardware disease or traumatic reticulitis. Et i o l o g y : Frequentl
Phytoplankton Stage - Hydrarch In this initial stage, the pond water is poor in nutrients and is devoid of much life. At this stage, the water is incapable of supporting large
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