Biology Test - 2 - Grade IX (CBSE)

Soybean is indeed one of the richest plant sources of protein, containing about 36-40% protein by weight. It's a complete protein source with all essential amino acids, making it valuable for vegetarian diets.

ATP (Adenosine Triphosphate) is the primary energy carrier in all living cells, providing the energy needed for metabolic processes.

Amino acids are the organic compounds that serve as the fundamental building blocks (monomers) of proteins.

The tonoplast is the specialized cytoplasmic membrane that surrounds the vacuole in plant cells, regulating the movement of ions and molecules.

Leucoplasts are non-pigmented plastids found in plant cells that function primarily for the storage of starch, lipids, or proteins.

Xanthophylls are yellow, orange, or red accessory pigments found in the chloroplasts of plants, which assist in photosynthesis.

Osmosis is the spontaneous net movement of solvent molecules through a semi-permeable membrane into a region of higher solute concentration.

Genes are specific segments of DNA that are organized and packaged into structures called chromosomes within the cell nucleus.

Lysosomes are single-membrane-bound organelles containing digestive enzymes. Mitochondria, chloroplasts, and the nucleus are all double-membrane-bound organelles.

Epithelial tissue (epithelium) forms the covering or lining of all internal and external body surfaces.

A gland is a group of cells or an organ that synthesizes and secretes substances such as hormones or enzymes.

Fibroblasts are the most common type of cell in connective tissue; they produce the extracellular matrix and collagen fibers.

Ligaments are tough, fibrous connective tissues that connect bones to other bones at joints.

Collenchyma is a supporting tissue in plants that is typically found in the hypodermis of stems and leaves, providing structural support while allowing for growth.

Meristematic cells are undifferentiated plant cells that are actively dividing, allowing for growth in length and girth.

Chondrocytes are the only cells found in healthy cartilage; they produce and maintain the cartilaginous matrix.

Diploblastic organisms develop from two germ layers, the ectoderm and endoderm, such as cnidarians.

Oviparous animals are those that reproduce by laying eggs, which then hatch outside the mother's body. Viviparous animals give birth to live young, while the other terms are not standard biological classifications for reproduction.

Spongin is a tough, fibrous protein that forms the skeletal framework of many sponges, providing structural support. Spongilla is a genus of freshwater sponges, not the material itself.

Iodine is essential for the production of thyroid hormones, which regulate the body's metabolic rate. A deficiency in iodine can lead to hypothyroidism and metabolic dysfunction.

The thorax is the body segment located between the head and the abdomen in insects and many other animals. The trachea is a respiratory tube, and the ventricle is a heart chamber.

A pseudopodium (false foot) is a temporary protrusion of the cytoplasm used by amoeboid cells for movement and feeding. The other options are unrelated terms or distractors.

Anemia is a condition characterized by a deficiency of red blood cells or hemoglobin in the blood, which reduces the oxygen-carrying capacity of the blood. Arrythmia refers to heart rhythm, and bulimia is an eating disorder.

Necrosis is the premature death of cells in living tissue caused by factors such as injury, infection, or toxins. Neurosis refers to a class of mental disorders.

A synapse is the junction between two neurons where nerve impulses are transmitted via neurotransmitters. The other terms are not biological structures for neural communication.