chapter 1- cellular structure Flashcards
what is the function of the mitochondria?
it breaks down glucose when oxygen is present to release energy for cellular activities during aerobic respiration.
what is the function of ribosomes?
to synthesise proteins
what are the examples of specialised cells?
root hair cell, RBC, muscle cells
what are the characteristics of a RBC
contains haemoglobin to bind oxygen, is flexible to squeeze through capillaries and has the absence of a nucleus to contain more haemoglobin.
what shape is the RBC?
biconcave
what is the difference between animal and plant cells?
animal cells does not contain chloroplast, chlorophyll and cell wall.
how different are the vacuoles in the animal and plant cell?
vacuoles in the animal cell are small, numerous, contains water and food substances and exists temporarily whereas the vacuoles in the plant cells are large, central and contains the cell sap
what does the chloroplast contain?
chlorophyll
what is the cell membrane made of?
lipids and proteins
how much can a electron microscope magnify till?
200 000 times
what is cellulose?
main substance in the cell wall.
what is the shape of a mitochondrion?
a small or sausage oval shape.
what is the nucleus essential for?
cell division, it controls cell activities and it contains information.
why is does the RBC have a biconcave shape?
to increase the rate of diffusion of oxygen and surface area and allows the cell to be flexible when squeezing through capillaries.
the function of cell membrane.
controls movement of substances moving in and out of the cell
