Out of the following
given choices;
a. Valine instead of glutamic acid in the
sixth position
b. Glutamic
acid replacing valine in the first position
c. Extensive
amino acid substitutions
d. Trinucleotide
repeats
e. Frameshift substitutions
The answer is A. this is caused by a mutation in the beta
thalassemia genes on one of the 46 human chromosomes (chromosome #11) of the individual.
The alpha subunit is normal in people with sickle cell disease. When sickle
hemoglobin releases oxygen in the peripheral tissues, the molecules tend to
stick together and form long chains or polymers. These rigid polymers distort
the cell and cause it to bend out of shape from
the normative disc shape.
Answer:
Explanation:
Transportation in plants is an interesting process. It includes the transport of all the nutrients and water to all parts of the plant for its survival. In case of plants, the biggest concern is the transport of water and it terminates at the limiting factor depending on its growth. To overcome this problem, a tree uses several processes like Translocation, Storing, Absorption and Utilization of water
Definition of Transportation in plants
Transportation is the process of transporting water, minerals and food to all parts of the plant body.
Transport in plants occurs at three levels:
The uptake and release of water and solute by individual cells.
Short distance transport of substances from one cell to another.
Long distance transport of sap within xylem and phloem.Direction of transport is an important aspect in plants. In case of rooted plants, transport in xylem of both minerals and water is unidirectional from roots to stems. In this, mineral and organic nutrients undergo multidirectional transport. It includes the organic compounds that are formed during photosynthesis are exported to all parts of the plants along with storage organs. Plant growth regulators, hormones and chemical stimuli are also transported in unidirectional or polarized manner, in very small amounts, from where they are formed to other parts
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TRUE. Most drugs are eliminated by the kidneys in urine although some are excreted in saliva, sweat, or exhalation.
An integrated explanation supported by extensive observation and experimentation and evaluated by the peer review process is called a scientific theory.
Peer review process is the system of analyzing and assessing the written manuscript before it is published in any journal. The process is performed to evaluate the dignity, originality and the significance of the manuscript. There are around 10 steps in the review process.
Scientific theory is a series of explanations for various facts and observations. The scientific theory should have some relevance, and if possible valid evidences as well. A theory can be proved even with the help of experiments.
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