Answer: The correct answer is- E) structural framework.
Fibrous proteins are water insoluble, elongated filamentous like structures that that provide structural framework ( they have special types of helices in their structures) to the cells or tissues of organisms.
They contain repetitive amino acid sequences in their structure that provides strength to the structure.
They are very less sensitive to any change in pH, temperature, as well as enzymatic digestion.
They are usually involved in the formation of connective tissue.
Example of fibrous protein- Actin, myosin, elastin, keratin.
Answer:
During interphase, centrosomes are duplicated.
Explanation:
Interphase is one of the two phases of cell cycle (other being mitotic phase).
Interphase is characterized by cell growth and DNA replication. It is subdivided into:
• G1 phase (the first gap phase) - the cell grows and becomes larger and copies organelles
• S phase – DNA and microtubule-organizing structure-centrosome are duplicated.
• G2 phase - proteins and organelles are formed.
G2 phase is followed by the beginning of mitotic phase.
Answer:
1. Designing of the target vector.
2. Insertion of the target vector into the embryonic stem cell
3. Selection of the cells
4. Injecting selected cells into the new cells
5. Breeding of mouse with a normal mouse
Explanation:
The target vectors are made by inserting markers into them. The target vector is inserted into ES cells. The vector generally recombined with the target gene and knock-out that gene. Sometimes, recombination of vectors occurs at incorrect place.
The cells survive in the presence of markers only if the target gene is incorporated with target vector. The cells with the target vector are injected into a normal developing embryo of mouse.
The developed mouse will consist of heterozygous knockout cells and its own cells. The normal mouse is bred with this chimeric mouse. The offspring of these mouse are able to transfer knock-out gene to next generation.
The correct answer is C, due to the fact that the things that power electrical energy are non-renewable, such as coal and other products. hope this helps, have an amazing day :)
