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What roles do membrane proteins play in transporting only certain substances into a cell?
Some proteins form channels or pores by which certain substances can pass.
Other proteins bind to a substance on one side of the membrane and take it to the other side.
Define Stage - Parts of the Microscope? It is a fixed platform positioned about halfway up the arm and provide surface for keeping the slide. Slide is held in position either b
What are the endocrine functions of the placenta? The placenta has endocrine function since it secretes the hormones progesterone and estrogen that maintain the endometrium (in
Define about the Photometry - colorimetry? Photometry is the measurement of the luminous intensity light or the amount of luminous light falling on a surface from such a source
How plants solve the problem of transporting substances throughout their tissues? In the bryophytes the substance transport is done by the diffusion. In the tracheophytes (pter
Water Logging Over saturation of soil with water is called water logging. If for any reason, the water-table rises close to the ground surface it is bad for plants and soil fer
What is a Food Allergy (Hypersensitivity)? A food allergy or hypersensitivity is an abnormal response to a food by our immune system. As illustrated in Figure, this non-toxic a
Q. How do ascaris obtain food? An ascaris live within the human gut and feed from the food ingested by the infected person.
Enumerate about the Traumatic brain injuries Brain injury is a common result of automobile and industrial accidents and of war injuries. Brain injury can affect brain function
Explain the Effect of Deficiency of Thiamin? Thiamin deficiency causes the disease beriberi in human beings, which has been classically considered to exist in dry (paralytic) a
Why could a disease be more serious in a population with a low genetic diversity? A population with a low genetic diversity could be more expected to be wiped out by a disease
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