Important Questions Test: Cell Structure & Functions - UPSC MCQ

A nerve cell is the longest cell in the human body.

Connective tissue includes blood.

A cell wall and vacuole are absent in animal cells.

The iris of the eye, uterus and bronchi contain smooth muscles.

Nervous system consists of brain, spinal cord and nerves.

Connective tissue give support to the body, and defends with pathogens and stores food in the body.

Epithelial tissue forms the outer protective covering all over the body and also lines body cavities.

The nervous tissue is present in the brain, the spinal cord and nerves.

Golgi bodies are usually called dictyosomes in plants. The main function of golgi body is to secrete digestive enzymes through membrane-bound vesicles.

Vacuoles are called the store houses of the cell and store water, food and the excreted substances of the cell.

The carbohydrate present in the plasma membrane helps in cellular recognition.

The cell is the structural and functional unit of life.

Plasma membrane or cell membrane does all the tasks mentioned in the question.

Cytoplasm is divided into cytoplasm and nucleoplasm.

The nucleus consists of genetic material in the form of a dense mass. It is surrounded by double membrane called nuclear envelope. It is the controlling centre of the cell.

Nucleus contains thread-like structures called chromosomes which are visible in a cell in the resting stage as chromatin threads. These threads unwind, shorten and thicken during cell division to become chromosomes

RBC of mammals do not contain nucleus, brain cells contain single nucleus and a paramoecium contains two nuclei.

Nucleus is called the 'control room' or 'brain' of the cell because it controls all the functions of the cell.

Mitochondria are the sites of cell respiration.

ATP is also called energy currency of the cell.