Answer:
biopolymer, or large biomolecule, essential to all known forms of life
Explanation:
Southern blot
agarose gel electrophoresis
polymerase chain reaction
Answer:
A. Polyacrylamide gel electrophoresis (PAGE)
Explanation:
Protein fragments of different size can be separated by gel electrophoresis method. Different proteins are made up of different number of amino acids and so the chain length vary i.e. the size of different proteins may vary. Also different proteins may have different charges due to difference in the type of amino acids present in them.
Generally for separating the protein fragments according to their size polyacrylamide gel is used. Foe this proteins are first given the heat treatment and treated with SDS for unfolding the protein. SDS is a detergent that imparts negative charge to protein. During electrophoresis, under the electric field the separation would be only due to size but not charge as all the proteins are treated with SDS and thus have same negative charge. This method is called SDS-PAGE. Under the electric field, small protein fragments will move fast through the pores compared to large fragments leading to their separation.
If two proteins are of same size then to separate them wither agarose gel electrophoresis is used or isoelectric focusing.
Answer:
Index fossil that is also known as indicator fossil is used to determine the age of the layers of the rocks. It says that the new layer of sedimentary rocks lie over the old layer.
The deeper we go, the older the rocks we will find. Index fossil of animals that lived or survived only for a short period of time are very useful. An example of index fossil can be Ammonites that were found in Mesozoic era that was about 25-35 million years ago.
Index fossils are used by geologists and palaeontologists to determine the relative age of rock layers and identify different geological periods. They are effective markers of time because they appear in a consistent, limited time span.
Index fossils are a powerful tool used by geologists and palaeontologists. Specifically, these fossils are used to determine the relative age of a layer of rock and identify geological periods. This is possible because index fossils are found to occur in a particular time span, and not beyond that.
For example, let's suppose a fossil of a creature that we know lived about 100 million years ago is found in a rock layer. This suggests that the rock layer would also probably be of the same period. Thus, index fossils serve as benchmarks or points of reference to determine the age of the surrounding materials.
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Answer:
25
Explanation:
Answer:
Oceanography
Explanation:
Oceanography or the marine science studies the earth's oceans and seas. It includes tectonics in the specific ocean, water currents etc.
THERE ARE MANY BRANCHES OF THIS TOPIC:
Ecology: the study of plants and animals in the water body.
Chemical oceaography: study of chemistry of the oceans
Metorology: study of ocean atmospheric interactions.
Oceanography began in late 1800's in the oceanographicinstitution in united states. The first organisation was created in 1902 as the "International council" for the "exploration of the sea".
Explanation:
oceanography
Dependent variables and independent variables in an experiment are defined as the terms of cause and effect.
The variables are:
In the given experiment, the dependent variable is the concentrated lactic acid and that of NAD+, whereas the control is the response of NAD+ and lactic acid in the absence of vitamin treatment.
The given experiment is about respiration in which the electrons from glycolysis and Krebs cycle are transmitted to the electron transport chain. In the electron transport chain, reduction of NAD+ into NADH takes place.
Thus, the variables in an experiment are used to study the hypothesize the results.
To know more about variables, refer to the following link:
Answer:
(a).concentrated lactic acid and that of NAD+.
(b).use of the response of NAD+ and lactic acid in absence of vitamin treatment as the CONTROL.
Explanation:
To understand this question and be able to solve this question efficiently we have to understand the concept of "respiration''. But, the short and the most simple answer to the question above can be found in the first statement of the question.
The electron transport chain include the cycle that occurs during glycolysis, fermentation and the transformation of NAD+ to form NADH and vice versa.
In the research, the dependent variable is the concentrated lactic acid and that of NAD+.
In order to increase the validity of the experiment, the Researcher can make use of the response of NAD+ and lactic acid in absence of vitamin treatment as the CONTROL.
All organisms are made of cells. All cells are similar in composition and metabolic activities. Thus, the correct option is A.
The first theory about cell was proposed by two German biologist Theodor Schleiden and Matthias Schwann in 1839.
The main postulates of this theory are as follow:
1. Cell is the basic structural and functional unit of living organisms.
3. All living organisms are composed of cells.
3. New cells arise from already pre existing cells by division.
Modern cell theory is the new version of same cell theory. It also added that all cells are chemically similar in composition and metabolic activities. Cells contain hereditary materials and energy flow occurs with in cell.
For more information regarding cell theory, visit:
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