7.4-12.2-12.3-13.1-13.2 Flashcards
Before a cell divides, it’s genetic information must be copied
Copying DNA
The instructions in the DNA of each cell must be sorted and passed from one generation to the next so the next generation can properly develop and reproduce
Transmitting DNA
What does DNA stand for?
Deoxyribonucleic acid
What is the sugar group in DNA?
Deoxyribose
What does RNA stand for?
Ribonucleic acid
What is the sugar group in RNA?
Ribose
Molecule that is made up of repeating units(monomers)
Ploymer
The monomers that make up proteins
Amino acids
The monomers that make up DNA and RNA
Nucleotides
What are the 4 nitrogen bases in DNA?
Adenine, thymine, cytosine, and guanine
What is the phosphate group in DNA and RNA?
Phosphoric acid
What makes up a nucleotide ?
A sugar group, phosphate group, and a nitrogen base
Who discovered that there was the same amount of adenine as thymine in a sample of DNA. Also the Sam was true with cytosine Zane guanine?
Erwin Chargaff’s
Who discovered the structure of DNA is a double helix through the use of X-Ray diffraction?
Rosalind Franklin
Who developed a model of the DNA (double helix)?
James Watson and Francis Crik
What is a double helix strand?
Two stands of nucleotides twisted around a central axis
What are the nitrogen bases held together by?
Hydrogen bonds
What nitrogen bases are always paired with each other in DNA?
Adenine with thymine
Cytosine with guanine
What nitrogen bases are always paired with each other in RNA?
Adenine with uracil
Cytosine with guanine
What does the double helix look like?
A twisted ladder
What do are steps of the ladder(double helix) made up up?
Nitrogen bases
What are the sides of the ladder(double helix) made up off?
The sugar group alternating with the phosphate group
Do the two strands of nucleotides in DNA strand run in the same direction?
True or false
False
DNA and histones that are long and thin
Chromatin
DNA and histones that are short and coiled
Chromosome
Proteins that DNA coils around
Histone
Untwists and unzips the DNA stand for DNA replication
DNA Helicase
What happens when the old strand of DNA has been separated between the nitrogen base pairs?
The DNA nucleotides that are floating around the nucleus match up with their appropriate base on the old DNA strands
Connects the newly matched
nucleotides to each other to complete the new DNA strand, also proofreads the new DNA strands
DNA polymerase
What happens when the hydrogen bonds have formed between the nitrogen bases on the old strand of DNA, and their
newly paired nucleotide?
DNA polymerase connects the covalent bonds between nucleotides (Sugar group to phosphate group) to complete the new strand of DNA
Short repeated DNA sequences on the
ends of chromosomes that prevent genes from being damaged or lost
Telomeres
The order of nitrogen bases in DNA
Genetic code
What happens when you change the order of nitrogen base pairs ?
You will change the characteristics of the organism.
The genetic material stores information needed by every living cell
Storing DNA
A stable internal environment that organism maintain
Homeostasis
How do unicellular organisms maintain homeostasis?
They grow, respond to their environment, transform energy and reproduce.
Different cells Preform different functions for the organism
Differentiation
Specialized cells are organized into tissues, tissues are organized into organs, organs are organized into organ systems.
Levels of organization
Basic unit of structure and function
Cell
Cells that work together to perform a common function form what?
Tissue
a group of cells that
work together to perform a common function
Tissue
a group of tissues that work together to perform a common function
Organs
A group of organs that work together to perform a common function
Organ systems
a group of organ systems that work together to form a single living thing that can perform all of the functions of life
Organism
What are the roles of RNA
uses information from DNA to put together proteins
Only one strand of nucleotides
information contained in the codes of nitrogen bases
Genetic code
Delivers the message from DNA to the ribosome to put the amino acids together in the right order.
Messenger RNA
Transfers the amino acids to the ribosome to be connected to the protein by a Peptide bond
Transfer RNA
Globular RNA and proteins that make up the bulk of the ribosomes
Ribosomal RNA
The production of RNA using DNA as a pattern (template)
Transcription
sequences of bases in DNA that show RNA polymerase where to begin making RNA
Promoters
untwists and unzips the DNA strand
RNA polymerase
Connects the new RNA nucleotides to each other. The result is a new strand of RNA
(Only enzyme involved in RNA transcription)
RNA polymerase
When the DNA says STOP, the RNA strand is released to the ribosomes to build proteins
Fact
sequence of DNA that does not code for a protein. This portion of RNA is cut out before the RNA leaves the nucleus
Introns
Sequence of DNA those code for a protein. When the introns are removed from the RNA, the exons are spliced back together
Exons
is read three letters at a time; each three letter “word” corresponds to a single amino acid
The genetic code
Set of three nitrogen bases on a mRNA strand that codes for an amino acid
Codon
Set of three nitrogen bases on tRNA that is complementary to the codon. This is how the tRNA knows where to bring the amino acid
Anticodon
the bond that holds the amino acids in a protein
Peptide bond
Ribosomes use the sequence of codons in mRNA to assemble amino acids into a polypeptide, which can then be folded into a protein
Facts
Decoding the information from mRNA to build proteins
Translation
______ RNA leaves the nucleus and travels to the ribosomes to
deliver the message.
Messenger
When the mRNA gets to the ______, the ______looks for “AUG”, the universal start Codon
Ribosomes
Each of the ____ represents a specific amino acid or STOP. Each
specific amino acid is transferred to the ribosome bythe Transfer RNA.
Codons
When the codon says stop the protein chain is released and heads to the ______?
Golgi body
Photosynthesis equation
CO2 + H2O + NRG(light) == O2 + CHO
Cellular respiration equation
CHO + O2 == CO2 + H2O + ATP(light)
Gene
Short segment of DNA on a chromosome
Protein
A line of amino acids held together by peptide bonds. Made In the ribosomes
Experiment in which all variables are kept unchanged except 1.
Controlled experiment
The Variable that is changed between the control group and experimental group
Manipulated variable
What we count of measure
Responding variable
Polypeptide
large number of amino-acid residues bonded together in a chain, forming part of a protein molecule
DNA
Deoxyribonucleic acid, Stores and transmits genetic information