Science Biology Flashcards
This dose not include the Bio plants and stuff since she is still teaching it.
What is Cell Theory?
A theory that states:
- All Living things are made up of one or more cells is the simplest unit that can carry out all life processes.
- The cell is the simplest unit that can carry out all life processes.
- All cells come from other cells; they do not come from non-living matter.
What is a Eukaryote, and give me an example of one.
A cell that contains a nucleus and other organelles, each surrounded by a thin membrane.
An example of a Eukaryote in both are:
-Amoeba (single)
-Animals and plants (multicellular)
What is a Prokaryote, and give me an example of one.
A cell that does not contain a nucleus or other membrane-bound organelles. They can come in single-celled organisms or multicellular organisms
An example of a Prokaryote is:
-E.coli
What is an Organelle?
A cell structure that preforms a specific function for the cell.
What organelles are found in a Plant cell that is not found in an Animal cell?
Chloroplast, Large/Central Vacuole, and Cell wall.
What organelles are found in an Animal cell that is not found in a Plant cell?
eh nutin’ riwy
What is a Cytoplasm? What does it do?
Description:
-Mostly water
-Other substances
-Jelly-like OR liquid
Function:
-Storage
-Chemical reactions
-Move organelles
What is a Cell membrane? What does it do?
Description:
-Flexible double-layered
-Semi-permeable
-surrounds the cell
Function:
-Protect the cell
-Semi-permeable/ allows certain things to enter and leave
What is a Nucleus? What does it do?
Description:
-Roughly spherical
-Contains DNA
Function:
-Contents DNA
-Controls the cell activity
-Copies DNA for cell division
What is a Mitochondria? What does it do?
Description:
-Called the “power plant”
-Contains enzimes
-Large reddish oval
Function:
-Produce energy for the cell through the use of CELLULAR RESPIRATION
What is an Endoplasmic reticulum? What does it do?
Description:
-A 3D network of branching tubes and pockets
-Extends throughout the cytoplasm and is continuous from the nuclear membrane to the cell membrane
Function:
-Transport materials, such as proteins
-helps with the production of hormones
-also muscle contraction
What is a Golgi body? What does it do?
Description:
-Series of networks
-Stack of pancakes
Function:
-Collect and process materials
-Remove things
-Secrete mucus
What are Vacuoles? What does it do?
Description:
-single-layery membrane
-fluid sac
Function:
-Both(Containing some substances, removing unwanted substances from the cell, and maintaining internal fluid pressure)
-there are other functions for different cells but we don’t gotta know dat I tink…
probably…
ish…
What are Risbosomes? What does it do?
Description:
-Tiny oval round structures
Function:
-Make proteins
What are Cell walls? What does it do?
Description:
-Rigged structure
-made of cibrohidatl(wait no its “cellulose” my notes are very hard to read)
Function:
-Protect the cell and support
What is Chloroplast? What does it do?
Description:
-Contains chlorophyll
-Green in colour
-All over the cell of a PLANT
Function:
-Absoprbes light energy
-Makes energy/food and stores is away(not the chloroplast)
Study the diagrams!!!!!!!!!!!!!!!!
They are in your notes…
Study the entire notes package since it is not in the q cards.
Asexual reproduction
A reproductive process that involves only one parent and produces offspring that are identical to the parent.
What is the difference in shape between plant cells and animal cells?
the plant is hard and rigid
animal is round and un shapable
Sexual reproduction
A reproductive process that involves two parents who combine their genetic material to produce a new organism, which differs from both parents
Diffusion
A transport mechanism for moving chemicals into and out of the sell from an area of higher concentration to an area of lower concentration
Concentration
The amount of a substance (solute) present in a given volume of solution
Osmosis
The movement of a fluid, usually water, across a membrane towards an area of high solute concentration
How does a single cell become a full-grown multicellular plant or animal?
Asexual reproduction/Mitosis/Cell disvision
When Mitosis occurs what is the offspring genetical form?
The same if performed without complication
How often do cells divide?
every 20 minutes after they are large enough
When a table is 99.9% bacteria-free, will it stay like that? explain?
No, The table will, every 20 minutes, divide to make 0.1% to 0.2%, etc…
How often do skin cells get replaced?
Skin cells die and are replaced every day
How often do red blood cells get replaced?
Red blood cells die and are replaced every 120 days
A minor wound heals over time, Explain how this happens.
MITOSIS……………….
Why do cells Divide instead of just getting bigger, as organisms grow?
As cells get bigger nutrients take a longer time to reach their destination starving the cell which kills it, and Waste product must diffuse out of the cell quickly so they do not poison the cell
Why are concentration, diffusion, and osmosis important for a cell?
These movements take in and out nutrients and waste to grow the cell
Cell cycle
(flip the Q card, not an answer)
Notes package since I cant show pictures
What are the stages of the cell cycle?
Interphase (G1), Interphase (S phase), Interphase (G2), Mitosis (Prophase), Mitosis (Metaphase), Mitosis (Anaphase), Mitosis (Telophase), Cytokinesis
What happens in G1
Growth
New Proteins & Organelles Made
What happens in the S phase of interphase?
DNA replication
What happens in G2 phase of interphase?
Continued protein synthesis and cell growth in preparation for cell division
What happens in the Prophase?
Chromosomes condense and are now visible
What happens in meta
Chromosomes line up in the middle of the cell
What happens in Anaphase
Sister chromatids split and move to either pole (Disjunction)
Why is mitosis an important life process?
GRRR:
Growth
Reproduction
Repair
Replacement
What happens in telophase?
Nuclear membrane reforms
Chromosomes decondense
Spindle fibres disappear
What happens in cy
division of the cell
How many stages are there in Interphase?
3, G1, S, G2
How many stages are there in Mitosis?
4, prophase, metaphase, anaphase, telophase
What is Cancer?
a broad group of diseases that result in uncontrolled cell division
What is a Tumour?
A mass of cells that continue to grow and divide without any obvious function in the body
What is a Benign Tumour?
A tumour that dose not affect surrounding tissues other than by physically crowding them
What is a Malignant Tumour?
A tumour that interferes with the functioning of surrounding cells; a cancerous tumour
Mutation
change in a DNA sequence that affects genetic information
Carcinogen
substance or environment that causes cancer
Heredity
the transmission of traits from one generation to the next, in context; cancer can be heredity
Metastasis
The spread of cancer cells beyond their original site to other organs
What is Cancer screening and why is it important?
It is finding a indication of Cancer. It is important because you can treat it easily the earlier you find it
4 Methods of cancer screening
enetic screening
Self-examination
Pap test
PSA test
Not so important
blood test
skin cheek with doctors
checking for moles ABCD’s
What are the ABCDs?
asymmetry, border irregularity, color, diameter
What is Genetic screening?
Testing DNA for the presence or absence of a particular gene or an altered gene that was heredity from family
What is Self-examination?
Felling for lumps or irregularity’s in the body
What is a Pap test?
A test that involves taking a sample of cervical cells to determine if they are growing abnormally
What is a PSA test?
Blood test to screen for prostate cancer
What are the 5 methods that can be used to diagnose cancer?
MRI
Endoscopy
X-ray
Ultrasound
CT scanning
What are 3 conventional methods of treating cancer?
Surgery
Chemotherapy
Radiation treatment
Are all cells in a complex organism the same/ identical?
No