Cell Biology and Structure

Plastids are membrane-bound organelles in plant cells that synthesize and store food - chloroplasts make food via photosynthesis, chromoplasts store pigments, and leucoplasts store starch. Plasma (A), polymer (B), and protein (D) are incorrect - plasma refers to membrane or blood fluid, polymers are large molecules, and proteins are synthesized not stored in these organelles.

The plasma membrane (also called cell membrane) forms the outer boundary of the cell, controlling what enters and exits. Endoplasmic reticulum (A) and golgi bodies (B) are internal organelles for protein synthesis and secretion. Cytoplasm (D) is the gel-like substance INSIDE the cell, not the boundary itself.

The largest cell in the human body is nerve cell 

The powerhouse of a cell is mitochondria. 

Ribosomes are the cellular sites where protein synthesis (translation) occurs - they read mRNA and assemble amino acids into proteins. The question's wording is slightly confusing because ribosomes are organelles, not processes - the process is translation. Centrosomes (A) organize division, chromosomes (C) carry DNA, and cellulose (D) is a structural polysaccharide in cell walls.

Mitochondria are the powerhouses of the cell where cellular respiration occurs, producing ATP through the Krebs cycle and electron transport chain. Ribosomes (A) make proteins, golgi bodies (B) process and package substances, and endoplasmic reticulum (D) synthesizes lipids and proteins - none are the primary respiration site.

Golgi bodies (or golgi apparatus) package, process, and secrete cellular products - they modify proteins and lipids from the ER and release them outside the cell. Plastids (A) are plant-specific for food storage, endoplasmic reticulum (B) synthesizes but doesn't secrete, and nucleolus (D) makes ribosomal RNA.

The endoplasmic reticulum (ER) is a network of membranes that extends throughout the cytoplasm of eukaryotic cells. It provides a large surface area for cellular reactions and connects to the nuclear envelope. The nucleus, nucleolus, and chromosomes are all nuclear structures, not cytoplasmic networks.

An animal cell and a plant cell differ in their mode of nutrition. 

The endoplasmic reticulum fits this description perfectly - it's a folded membrane network in the cytoplasm that synthesizes proteins (rough ER) and lipids (smooth ER), then transports materials to the Golgi apparatus. Cytoplasm is the fluid matrix, lysosomes break down waste, and the Golgi apparatus modifies and packages proteins.

Genes are segments of DNA located on chromosomes within the nucleus. Each chromosome contains hundreds to thousands of genes. The nucleolus produces ribosomes, plasma membrane regulates transport, and mitochondria produce energy - none of these house genes.

The centrosome, which contains centrioles, is located in the cytoplasm near the nucleus. It organizes microtubules and plays a crucial role in cell division. Golgi bodies and plastids are other organelles, while the nucleus houses genetic material.

The cytoplasm acts as a reservoir for vital chemicals including amino acids, glucose, vitamins, ions, and other metabolites needed for cellular reactions. Protoplasm is the entire living content, golgi bodies modify proteins, and nucleolus makes ribosomes.

Library contains books as tissue contains cells. 

The mammalian liver, in its histological structure, is characterized by the presence of Glisson's capsules and Kupffer cells.