A) Ability to reproduce
B) Ability to grow and develop
C) Ability to move
D) Ability to respond to stimuli
Not all living organisms have the ability to move. For example, plants do not move in the same way animals do, but they can grow and respond to environmental stimuli. Movement is not a requirement for life.
A) To transport oxygen and nutrients
B) To regulate body temperature
C) To protect the body from infections
D) To assist in digestion
The circulatory system is responsible for transporting oxygen, nutrients, and hormones to cells throughout the body. It also helps remove waste products like carbon dioxide.
A) Respiration
B) Fermentation
C) Photosynthesis
D) Digestion
Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy, typically from the sun, into chemical energy stored in glucose. This process takes place in the chloroplasts of plant cells.
A) Proteins and Nucleic acids
B) Carbohydrates and Nucleic acids
C) Lipids and Proteins
D) Carbohydrates and Lipids
The cell membrane is primarily composed of a lipid bilayer (mainly phospholipids) with embedded proteins. This structure allows the membrane to be semi-permeable and maintain cellular integrity.
A) Protein synthesis
B) DNA replication
C) Energy production
D) Detoxification
Ribosomes are responsible for translating genetic information from mRNA into proteins. They are found either floating freely in the cytoplasm or attached to the rough endoplasmic reticulum.
A) Nucleus
B) Ribosome
C) Mitochondrion
D) Endoplasmic Reticulum
The mitochondrion is known as the powerhouse of the cell. It is responsible for producing energy (in the form of ATP) through cellular respiration, which is critical for the cell’s activities.
A) Atom
B) Cell
C) Organ
D) Tissue
The cell is the basic structural, functional, and biological unit of all living organisms. It is often called the “building block of life.” All organisms are made up of cells, and all life processes occur within cells.
A) Nucleus
B) Ribosome
C) Mitochondrion
D) Endoplasmic reticulum
The mitochondrion is often referred to as the powerhouse of the cell. It is responsible for producing energy in the form of ATP through cellular respiration. The nucleus controls cell activities, the ribosome is involved in protein synthesis, and the endoplasmic reticulum helps in protein and lipid synthesis.
A) All living organisms are composed of cells.
B) The cell is the basic unit of structure and function in living organisms.
C) All cells arise from pre-existing cells.
D) Cells can form from non-living matter.
The cell theory states that all living organisms are made up of cells, cells are the basic unit of structure and function, and all cells arise from pre-existing cells. The idea that cells can form from non-living matter is not part of the cell theory and is an outdated notion known as spontaneous generation.