The organelle that contains oxidative enzymes and is involved in photorespiration is: MCQ with Answer and Explanation

Explanation:
Klinefelter syndrome (47,XXY) is a sex chromosome aneuploidy causing male hypogonadism, tall stature, gynecomastia, and infertility. Turner syndrome (45,X) affects females. Down syndrome is trisomy 21. Cri du chat is deletion in chromosome 5. Nondisjunction during meiosis leads to these aneuploidies.

Explanation:
The human endoskeleton consists of 206 bones and cartilage at joints and in structures like the nose, ears, and intervertebral discs. Bone is mineralized connective tissue, cartilage is a specialized connective tissue. Chitin is found in arthropod exoskeleton and fungal walls, keratin is a protein in skin, hair, nails. The skeleton provides support, protection, and movement.

Explanation:
The hypothalamus regulates body temperature, hunger, and thirst, and controls the pituitary. Reflex actions are primarily coordinated by the spinal cord, not the hypothalamus. Hence, D is incorrect.