Consider the following statements about the skeletal system: 1. Bones store calcium and phosphorus. 2. Red bone marrow produces blood cells. 3. Ligaments connect muscle to bone. Which of the above is/are correct? MCQ with Answer and Explanation
Consider the following statements about the skeletal system:
1. Bones store calcium and phosphorus.
2. Red bone marrow produces blood cells.
3. Ligaments connect muscle to bone.
Which of the above is/are correct?
A. 1 and 3 only
B. 2 and 3 only
C. 1 and 2 only
D. 1, 2, and 3
Answer: Option C
Solution (By JKSSB Mock Tests)
Bones store minerals (1) and contain marrow for hematopoiesis (2). Ligaments connect bone to bone; tendons connect muscle to bone. So 3 is incorrect.
In plant physiology, the 'Guttation' is the process by which water is exuded from the plant in liquid form. This typically occurs from specialized structures at the leaf margins called:
Explanation:
Guttation is the exudation of water in liquid form from the intact, uninjured surfaces of plants, typically from the margins or tips of leaves. This occurs when root pressure is high (usually at night or early morning when transpiration is low and soil moisture is high) and the rate of water absorption exceeds the rate of transpiration. The water is forced out through specialized structures called hydathodes (or water stomata), which are located at the leaf margins and lack the mechanism to close like regular stomata.
Explanation:
Mitochondria are known as the powerhouse of the cell because they are the site of aerobic respiration and ATP production. They are semi-autonomous because they possess their own circular DNA, RNA, and 70S ribosomes, allowing them to synthesize some of their own proteins and replicate independently of the nucleus.
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