Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Science Notes #19

DNA (Deoxyribonucleic Acid)

QuestionAnswer
What is DNA? An organic molecule that makes up chromosomes and genes
What is DNA responsible for? All the inherited difference among organisms (genetic blueprint)
What does DNA control? The activities of the cells with it's coded instructions
How many cells contain DNA? 100 trillion
Who first discovered DNA molecules in what year? Rosaling Franklin-1951
What is the double helix spiral? DNA staircase strand of molecules
How did Rosaling Franklin see DNA molecules? X-ray machine
Who were the 2 men who made a model of DNA's double helix spiral? James Watson + Francis Crick
What is in the nucleus of every cell? A copy of the organism's unique blueprint
What is DNA twisted up into? Chromosomes
How many of each chromosome is in the nucleus? 2
How many chromosomes do humans have? 46
What are the 4 nitrogen bases? Adenine, thymine, guanine, cytosine
What is a codon? A set of 3 pairs of DNA
Each codon codes for 1-____ different ________ to make a protein. 20, amino acids
What is a nucleotide? A section of DNA that is made up of 1 sugar molecule, 1 phosphate molecule and 1 nitrogen base
What is the genome? The complete set of instructions for the organism
What does RNA stand for? Ribonucleic acid
How many strands of DNA make up RNA? 1
What is RNA's nitrogen base and who does it bond with? Uracil bonds with adenine
Where is RNA made? Nucleolus
What are the 2 types of RNA? Messenger RNA and transfer RNA
What is RNA's job? Transfer a copy of DNA from the nucleus out into the cytoplasm to help ribosomes make proteins.
What bonds to create a protein molecule? Amino acids and a code of DNA copied
What is protein synthesis? The process of transfering materials by RNA to ribosomes to create proteins.
Humans have greater than how many genes? 30,000
What are proteins made up of? Amino acids
What controls what protein is made? The order of the amino acids
Specific proteins carry out specific what? Functions
What percent of your genes are Junk DNA? 20%
What is junk DNA? Genes that don't code for proteins or regulate traits
What is cell division? When cells divide to create new cells.
What is DNA replication? Copying DNA for a new cell.
What is a harmful mutation? Cancer
Where do mutations occur? Sex cells
What are scientists creating to cure hemophilia? Synthetic DNA
What scientists study evolutionary relationships among organisms? Taxonomists
What is genetic engineering? A manipulative DNA changer that forms more DNA that is resistant to diseases
Created by: rozeepozee9893
Popular Science sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards