Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Science- 7th
7th Grade
| Question | Answer |
|---|---|
| Where are specialized cells found? | specialized cells are found in tissues. |
| What is the function of the nucleus? | cell's control center. |
| Describe animal cells. | lacks cell wall and chloroplasts |
| Describe plant cells. | has cell wall and chloroplasts |
| Describe bacteria cells. | lacks membrane covered organelles |
| How do electron microscopes work? | electrons are sent over the surface of an object. |
| How do light microscopes work? | magnify an object by bending the light passing through them |
| What is resolution? | another term for sharpness of an object |
| Why was the invention of the microscope important? | people were able to observe cells |
| What type of cells did Leewenhoek observe? | water teeth scrapings and gum scrapings |
| Why is water important to cells? | many chemical reactions could not happen without water |
| Why are enzymes important to cells? | protein that speeds up chemical reactions |
| Define element. | any substance that cannot be broken down into smaller pieces |
| Define compound. | two or more elements combined chemically |
| all organic compounds have what element? | carbon |
| what are starches made from? | carbon hydrogen oxygen |
| Define diffusion. | main method by which small molecules move across the cell membrane |
| Define osmosis. | diffusion of water |
| Define active transport. | things moving in and out of a cell using energy |
| Define passive transport. | things moving in and out of a cell using no energy |
| Types of active transport. | active and passive |
| what causes cancer? | damaged dna |
| How many types of cancer? | over 100 |
| treatments for cancer? | radiation surgery and drugs |
| what factors cause cancer? | the damaged dna causes the cell cycle to go too fast and cells replicate before it is time and a tumor is caused |
| what happens in cancerous cells? | they replicate too fast |
| what are tumors? | a mass of cells that divides uncontrollably |
| what is photosynthesis? | a process by which a cell uses sunlight for energy |
| how do the raw materials get into the plants' cells? | sunlight is captured and combined with water and co2 to produce sugars |
| what are the products of photosynthesis? | sugar and oxygen |
| how does photosynthesis benefit heterotrophs? | plants get eaten by heterotrophs. |
| how does sunlight energy get captured for photosynthesis? | chloroplasts absorb sunlight |
| what is respiration? | cells break down simple food molecules and use their energy |
| where is most energy released during respiration? | mitochondria |
| how is respiration related to photosynthesis? | the raw materials of one are the products of the other |
| how do respiration and photosynthesis affect the levels of oxygen in the air? | respiration uses oxygen and photosynthesis creates it |
| how do respiration and photosynthesis affect the levels of carbon dioxide in the air? | photosynthesis uses co2 and respiration creates it |
| what is fermentation? | an energy releasing process that uses no oxygen |
| what are the two types of fermentation? | alchoholic and lactic acid |
| where does fermentation occur? | muscles |
| when does fermentation occur? | when oxygen does not get to the muscles fast enough |
| what is the cell cycle? | the regular sequence of growth and division in cells |
| what is the order of the steps in the cell cycle? | interphase mitosis cytokinesis |
| which steps are a part of mitosis? | prophase metaphase anaphase telophase |
| define mitosis. | the stage where the nucleus splits |
| define centromere. | holds two chromatids together |
| define chromatids. | each identical rod in a chromosome |
| what is the structure of dna? | a twisted ladder |
| what bases make up dna? | adenine guanine cytosine thymine |
| what is a mutation? | where a base pair is substituted added or deleted |
| when are mutations harmful? | when it reduces an organism's chance of survival or repruduction |
| what are chromosomes made of? | condensed double rods of chromatin |
| what determines the genetic code? | the order of the nitrogen bases |
| what is copied during replication? | dna |
| what are chromatids? | each identical rod in a chromosome |
| how are dna and rna different? | there is no thymine in rna instead there is uracil |
| where does protein synthesis occur? | on the ribosomes |
| what is the job of mrna? | copies the coded message |
| what is the job of trna? | carries amino acids to the ribosomes |
| what does the order of the bases determine? | genetic code |
| define alleles. | different forms of a gene |
| define traits. | different forms of a characteristic |
| define dominant. | overpowering |
| define recessive. | hidden when dominant was present |
| define probability. | number that describes likeliness |
| define homozygous. | someone who has two of the same genotype |
| define heterozygous. | someone who has two different genotypes |
| define genotype. | the dna code |
| define phenotype. | the physical appearance |
| define hybrid. | heterozygous |
| define purebred. | homozygous |
| define genes. | factors that control a trait |
| what did mendel do in his experiments? | he crossbred pea plants |
| what happens during meiosis? | a process by which the number of chromosomes is reduced by half to create sex cells |
| what did sutton learn about sex cells? | he learned half the chromosomes were in sex cells |
| how much genetic material does each sex cell contribute to the offspring? | half |
| what is the chromosome theory of inheritance? | genes are carried from parents to offspring on chromosomes |
| what is the function of the cell wall? | protect and support plant cell. |
| what is the function of the cell membrane? | controls what comes in and out of cell |
| what is the function of the nuclear envelope? | protects nucleus. |
| what is the function of the chromatin? | help nucleus control cell. |
| what is the function of the nucleolus? | is where ribosomes are made. |
| what is the function of the mitochondria? | they convert the energy in the food into energy the cell can use to carry out functions. |
| what is the function of the endoplasmic reticulum? | carries proteins around the cell. |
| what is the function of the ribosomes? | produce proteins. |
| what is the function of the golgi bodies? | receive proteins, package them and distribute them. |
| what is the function of the chloroplasts? | capture energy from sunlight and use it to produce food for the cell. |
| what is the function of the vacuoles? | storage area. |
| what is the function of the lysosomes? | break down certain materials in cell. |
Created by:
brend15
Popular Genetics sets