<span>There are three main types of stem cells: adult stem cells, embryonic stem cells and induced-pluripotent stem cells, or iPSCs. </span>
Answer:
The addition of a chromosome in an egg cell.
Explanation:
Mutation may be defined as sudden, heritable change in the DNA sequences. The mutation may be caused during the DNA replication or may be caused by the environmental factors.
The mutation that occurs in the gametic cells may pass down from parents to their offspring. The addition of an extra chromosome in egg cell will be inherited in the next generation.
Thus, the correct answer is option (C).
Explanation:
The Calvin cycle (also known as the Calvin-Benson cycle or the carbon fixation cycle of photosynthesis) consists of a series of biochemical processes that are carried out in the stroma of the chloroplasts of photosynthetic organisms.
The reactions of the Calvin cycle belong to the so-called independent phase of light, which is responsible for fixing the CO2, incorporating it into the organic matter of the individual in the form of glucose by means of the RuBisCo enzyme. It should be noted that this set of reactions is mistakenly called the dark phase, since many of the enzymes in the process, including RuBisCo, depend on the activation of the ferredoxin-thioredoxin system, which is only found in its active form (the reduced one) in the presence of the light.
The answer to the question being asked about the relation between amino acid and polypeptide is similar to the relation between monossacharide and carbohydrates. Amino acid is the repeating unit of polypeptide. For the carbohydrates, its repeating unit is a monossacharide.
Answer:
<h2>Ethylene is a gaseous hormone in plants, it is a fruit ripening hormone.</h2>
Explanation:
Ethylene is a chemical signal through which ripening fruits trigger the ripening process in fruits, Studies on components of ethylene signaling have shown a linear transduction pathway leading to the activation of ethylene response factors. However, the whole pathway by which ethylene selects the ripening-related genes and interacts with other signaling pathways to regulate the ripening process still not yet fully known. Most fruits produce ethylene that starts the ripening process. Its level in under-ripe fruit is very low, but as fruit develop, the production of ethylene become larger that speed up the ripening process of fruit.
