Answer:
The answer is (1) It initiates a cascade.
Explanation:
Signal transduction pathways regulate many important cellular functions such as growth, differentiation, metabolism, and survival. Many of these signaling pathways are altered in human cancer.
<em>Receptor tyrosine kinases </em>are cell surface receptors that play a role in the signaling pathways governing cellular processes of metabolism, intercellular communications, differentiation, survival, and proliferation.
They bind to their corresponding growth factors, triggering the downstream signaling cascade.
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Answer:
See explanation
Explanation:
We know that the momentum of a body is defined as the product of mass and velocity of the body.
Let us now obtain the momentum for each item on the list;
Football player = 100 * 10 = 1000 Kgms-1
Skier = 60 * 20 = 1200 Kgms-1
Frog = 0.9 * 12 =10.8 Kgms-1
Meteorite = 0.1 * 1000 = 100Kgms-1
Base ball = 0.14 * 30 = 4.2 Kgms-1
Satellite = 3000 * 8000 = 24000000 Kgms-1
Steel ball = 2.0 * 2.8 = 5.6 Kgms-1
The 2 organelles that contain their own DNA are the chloroplast and mitochondria
Where is the illustration
Answer:
Epistasis
Explanation:
In epistasis, the interaction between genes is inimical, such that one gene masks or interferes with the expression of another. “Epistasis” is a word coined of Greek roots that mean “standing upon.” The alleles that are being masked or silenced are said to be hypostatic to the epistatic alleles that are doing the masking. The cause of the biochemical basis of epistasis is a genetic pathway in which the expression of one gene is dependent on the function of a gene that precedes or follows it in the pathway.
The example of epistasis given is the pigmentation of mice. we were told that "if a mouse has two recessive alleles for coat color, it is always albino no matter what the genotype of other genes involved in coat color"
Let say recessive allele (rr), it is always albino irrespective of other type of other genes, this is true in the stance that epistasis can be reciprocal such that either gene, when present in the dominant (or recessive) form, expresses the same genotype.