science test revision- cells
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (24 张)
MRS C GREN STANDS FOR…?
Movement Respiration Sensitivity Control Growth Reproduction Excretion Nutrition
The three main parts to cell theory are…
• all organisms are composed of cells • all living structures are composed of cells • all cells are made from existing cells
what is the function of these parts of a cell: cell wall cell membrane cytoplasm nucleus mitochondria starch grain chloroplasts vacuole
cell wall: provides support and is strengthened with cellulose cell membrane: thin membrane which controls what goes in and out of the cell cytoplasm: many important reactions take place here nucleus: controls the cell and stores genetic information (DNA) mitochondria: this is where RESPIRATION takes place (AN IMPORTANT REACTION IN ALL LIVING THINGS TO RELEASE ENERGY FROM FOOD) starch grain: food store in plants vacuole: helps provide support in combination with the cell wall
what features does an animal cell have
cell membrane, cytoplasm, nucleus, mitochondria
what features does a plant cell have
cell membrane, cell wall, vacuole, cytoplasm, nucleus, mitochondria ,chloroplasts (not in underground cells), starch grain ( not in all plant cells)
label an animal cell and plant cell
refer to images
what are two features which you can see in an onion cell
• cell wall • nucleus
why are there no chloroplasts in onion cells
onion bulbs are grown underground and therefore cannot photosynthesize as photosynthesis requires sunlight. This means they do not need chloroplasts.
what does the red blood cell do
Red blood cells carry oxygen from our lungs to the rest of our bodies.
what do white blood cells do
They flow through your bloodstream to fight viruses, bacteria, and other foreign invaders that threaten your health. When your body is in distress and a particular area is under attack, white blood cells rush in to help destroy the harmful substance and prevent illness. White blood cells are made in the bone marrow.
why do onion cells not contain chloroplasts?
Since the onion bulb grows underground, it doesn’t see any sunlight and so it doesn’t have any chloroplasts for photosynthesis.
What is the basic unit of life?
Cell
True or False: All living organisms are made up of cells.
True
What is the function of the nucleus in a cell?
It contains the genetic material (DNA).
Fill in the blank: In plants, the cell wall is made of ______.
cellulose
What is the semi-permeable membrane that surrounds a cell called?
Cell membrane
Multiple choice: Which organelle is responsible for energy production? A) Ribosome B) Mitochondria
B) Mitochondria
What is the role of ribosomes in a cell?
They synthesize proteins.
True or False: Stem cells can differentiate into different cell types.
True
Fill in the blank: The genetic material in a cell is found in the ______.
nucleus
What is fertilization?
The fusion of male and female gametes. or the sperm and egg
True or False: All cells in an organism contain the same DNA.
True
What is the role of the chloroplast in plant cells?
It is responsible for photosynthesis.
Multiple choice: Which type of organism is composed of prokaryotic cells? A) Bacteria B) Plants
A) Bacteria