Adenosine triphosphate (ATP) is the universal energy currency of the cell, storing energy in its high-energy phosphate bonds. Hydrolysis to ADP releases energy for cellular work. NADH and FADH₂ are electron carriers in respiration, ultimately used to produce ATP. Glucose is a fuel molecule, broken down to produce ATP. ATP is directly used in processes like muscle contraction and active transport.
Explanation:
The nucleolus makes rRNA and assembles ribosomal subunits. Nucleus has a double membrane, is present in eukaryotes, and is the site of DNA replication.
Consider statements about bryophytes: 1. They are called amphibians of the plant kingdom. 2. They possess vascular tissues. 3. They require water for fertilization. Which are correct?
Explanation:
Bryophytes are termed amphibians of the plant kingdom because they live on land but require water for the swimming of male gametes to reach the egg during fertilization. They lack true vascular tissues (xylem and phloem), which first appear in pteridophytes. Therefore, statements 1 and 3 are correct, but statement 2 is false.
Explanation:
Antidiuretic Hormone (ADH), also known as vasopressin, is released by the posterior pituitary in response to osmotic pressure or fluid loss. It acts primarily on the collecting ducts of the nephrons to increase water reabsorption by making them more permeable to water. This prevents diuresis (excessive urine production) and helps conserve body water.
No comments yet. Be the first to start the discussion!