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:
#SPJ5
B. dense irregular connective tissue
C. dense regular connective tissue
D. reticular connective tissue
The lamina propria, found in various organs in the body, is composed of loose connective tissue. It serves as a supportive framework and is crucial for immune response.
The lamina propria is a component of the mucosa layer in various organs in the body, including the digestive and respiratory tracts. Regarding its composition, the lamina propria is composed of loose connective tissue. This type of tissue is characterized by its loose, flexible structure, which allows it to provide support and nourishment to surrounding structures. The lamina propria, therefore, serves as a supportive framework and plays a key role in immune response within the mucosa.
#SPJ6
Canola oil contains many carbon-to-carbon double bonds, which are rare in butter. These double bonds influence the physical properties of fats and contribute to differences in their consistency.
The type of bond found in many carbon-to-carbon bonds in canola oil but very few carbon-to-carbon bonds in butter is a "double bond." Canola oil contains a higher proportion of unsaturated fats, specifically monounsaturated and polyunsaturated fats, which have one or more double bonds between carbon atoms in their fatty acid chains. Butter, on the other hand, primarily consists of saturated fats, which lack double bonds between carbon atoms.
The presence of double bonds affects the physical properties of these fats, making canola oil more liquid at room temperature due to its unsaturated nature, while butter, with its saturated fats, remains solid. This difference in double bond content is one reason for the varying characteristics of these fats.
To learn more about Canola, visit this link:
#SPJ12
B. weigh the food
C. look at amount of Calories
D. look at what color the food is
Answer:
The Spiracles is/are used for gaseous exchange in insects.
Explanation:
The Spiracles is a respiratory structure or an opening found on the exoskeleton of insects. It acts as a medium of gaseous exchange not only for Insects (Insecta) but also for some Arachnid (spiders and others).
Answer:
Osteoblasts
Explanation:
Cells that secrete protein fibres in bones are called osteoblasts.
I hope this helps.