cell structure

Question 1

organelle

Answer 1

Specialised structures inside cells with specific functions.

Question 2

plasmid

Answer 2

Small circular DNA molecule, physically separate from chromosomal DNA, found in bacteria and some other microscopic organisms.

Question 3

flagellum

Answer 3

tail on prokaryotes
A hair-like appendage that protrudes from certain cells, and from a wide range of microorganisms to provide motility.

Question 4

life processes

Answer 4

Metabolism: chemical reactions that take place within the cell(s) of an organism (see subtopic C1.1).
Response to stimuli: reacting to changes in the external environment (see subtopic C3.1).
Homeostasis: the maintenance of constant internal conditions, despite changes in their external environments (see subtopic D3.3).
Movement: living things have some control over their place and position(see subtopic B3.3).
Growth: cells can increase in size over a period of time. In multicellular organisms, growth can also refer to an increase in the number of cells that make up an organism (see subtopic D2.1).
Reproduction: the production of offspring. Reproduction can be sexual or asexual (see subtopic D3.1).
Excretion: the removal of metabolic waste products (see subtopic D3.3).
Nutrition: the intake or production of nutrients. Heterotrophic organisms obtain their nutrients from the external environment, whereas autotrophic organisms are able to produce nutrients from inorganic material (see subtopic B4.2).

Question 4

pili

Answer 4

Protein filaments on the cell wall that help with cell adhesion and transferring of DNA between two cells.