Vitamins A, D, E, and K are fat-soluble, stored in body fats and liver. Vitamin K is essential for blood clotting (synthesis of prothrombin). Vitamin B complex and vitamin C are water-soluble, excreted in urine and not stored extensively. Fat-soluble vitamins require dietary fat for absorption. Excess of fat-soluble vitamins can cause toxicity (hypervitaminosis).
Explanation:
The atlantoaxial joint (between atlas and axis vertebrae) is a pivot joint, allowing rotation of the head ('no' motion). Hinge allows flexion/extension, ball and socket multiaxial, gliding sliding. The odontoid process of the axis acts as a pivot.
Consider the following statements about ecosystem:
1. Producers are autotrophs.
2. Consumers are heterotrophs.
3. Decomposers recycle nutrients.
Which of the above is/are correct?
Explanation:
Tryptophan is encoded by a single codon, UGG. Methionine (AUG) is also encoded by a single codon. The other amino acids have multiple codons (degeneracy). For example, leucine has 6 codons. The single codons for Trp and Met are significant as they are less likely to tolerate mutations.
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