The scientist who discovered the structure of insulin was:
A. Frederick Sanger
B. Dorothy Hodgkin
C. Frederick Banting
D. Charles Best
Answer: Option A
Solution (By JKSSB Mock Tests)
Frederick Sanger determined the amino acid sequence of insulin in 1955, showing proteins have a specific sequence. Banting and Best isolated insulin, Hodgkin determined its 3D structure.
Consider the following statements about vitamins:
1. Vitamin A is fat-soluble.
2. Vitamin C is water-soluble.
3. Vitamin D can be synthesized in the skin by sunlight.
Which of the above is/are correct?
Explanation:
Analogous organs are structures that perform similar functions but have different anatomical structures and evolutionary origins. The wings of a bird (modified forelimbs with bones and feathers) and the wings of an insect (membranous extensions of the exoskeleton) both evolved for flight but are not derived from a common winged ancestor. This is an example of convergent evolution.
Explanation:
Diastole is the relaxation phase of the cardiac cycle, during which the ventricles fill with blood from the atria. Systole is the contraction phase, pumping blood out. Atrial contraction (atrial systole) contributes to ventricular filling. Ejection phase is part of ventricular systole when blood is ejected. Normal diastolic and systolic pressures are 80 and 120 mmHg respectively.
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