Folic acid (folate) deficiency during pregnancy increases the risk of:
A. Scurvy
B. Rickets
C. Night blindness
D. Neural tube defects
Answer: Option D
Solution (By JKSSB Mock Tests)
Folate (vitamin B₉) is crucial for DNA synthesis and cell division. Inadequate folate early in pregnancy can cause neural tube defects like spina bifida in the fetus. Supplementation is recommended.
Explanation:
The aorta is the main and largest artery originating from the left ventricle, distributing oxygenated blood to all parts of the body through its branches. The pulmonary artery carries deoxygenated blood to lungs. Coronary arteries supply the heart muscle, carotid arteries supply the brain. The aorta has a diameter of about 2-3 cm in adults.
Explanation:
The Krebs cycle (citric acid cycle) occurs in the mitochondrial matrix in eukaryotes. The enzymes for the cycle are soluble in the matrix. The inner membrane houses the electron transport chain and ATP synthase. Cytoplasm is the site of glycolysis, chloroplast stroma is the site of the Calvin cycle. Thus, the matrix is the correct location.
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