b. missense
c. insertion
d. frameshift
Ans. (b). missense.
Sickle cell anemia is an inherited blood disorder, due to defect in oxygen-transporting protein, hemoglobin. It is caused by a mutation in a gene that codes for hemoglobin that substitutes GAG codon (that codes for glutamic acid) with codon GUG (that codes for valine).
It is known as a missense mutation, which leads to formation of a non-functional or defected protein (hemoglobin). The defected hemoglobin gets polymerized and forms fibers that give sickle-shape to the red blood cells.
Thus, the correct answer is option (b).
The type of mutation that causes sickle cell anemia is called missense. That is option B
Mutation is defined as the alteration that occurs in the gene of an organism which leads to defective formation in the organism.
Sickel cell anemia occurs when there is missense mutation at a single point in their DNA.
Therefore, the type of mutation that causes sickle cell anemia is called missense.
Learn more about anemia here:
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Answer:
1) Conduction.
Heat transfers to a spoon as the heat energy is passed from the coffee to the spoon through conduction.
2) Radiation
The heat on the glass surface gets radiated into the chair which causes the chair to warm up.
3) Convection
The globs are hot and less dense, which rises to the top whereas the cold globs are more dense which causes it to settle down.
1. Hot coffee warms the spoon through conduction,
2. a chair warms through radiation from the fireplace,
3. decorative lamp globs rise through convection.
1. Hot coffee is stirred with a spoon, the spoon gets hot due to conduction.
2. A chair is placed several feet from a fire in a fireplace. The fireplace has a glass screen. The side of the chair facing the fireplace gets warm because of radiation.
3. A certain type of decorative lamp contains colored liquids. These liquids form globs that break off and rise to the top of the liquid. The globs rise due to convection.
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B. cell walls
C. centrioles
D. central vacuoles
A is the correct answer!
Rough endoplasmic reticulum
Cytoskeleton
Mitochondria
Answer
Rough endoplasmic reticulum
Explanation:
The site of protein synthesis occurs in ribosomes, which are located in the rough endoplasmic reticulum.
Answer:
A. In a stable ecosystem, life forms have enough food for energy and they are not wasting that energy trying to adapt t their environment. This gives them added opportunities to grow and reproduce. A stable ecosystem can extend its boundaries and interact with an adjoining ecosystem which could benefit both ecosystems.
Explanation: