Test 4 Flashcards
Hydrobond
hold DNa in double helix shape
Helicase
What breaks hydrogen bonds and uncoils DNA double helix
Primase
Enzyme that makes the Primer for a starting point for replication
DNA Ligase
glues all segemtns together
Exonuclease
removes primers cause primers are RNA
DNA polymerase
makes new DNA strands.
Nucleotides
building blocks of DNA and RNA
structure: Phosphate group, 5 carbon sugar, and nitrogen base.
Nitrogen bases
one of the three parts of a nucleotide (A, T, G, C)
Hydrogen bonds
Keep DNA in a doublr helix
Double helix
DNA two strands twisted together and DNa’s shape,
Replication fork
where the start where DNA is unwinded.
Leading strand
creates DNA from 5 to 3
Lagging strand
creates DNA from 3 to 5 and has to be done in segments
Complementary strands
the new strands being made
Okazki fragments
short segments of DNA that are created on the Lagging strand
Template
the original strands that the complementary strand is built off of.
Semiconservative
old strand with new strand.
LIst the stages of the Cell cycle and what happens at each
- G1- Growth
- Synthesis- DNA replication
- G2- Organelles replicate
- Mitosis/ Meiosis- New nuclei made
- Cytokinesis- Cytoplasm split into two cells
3 possible outcomes of a cell that enters the cell cycle:
- Specialize
- Apoptosis
- Divide
List 3 cell in the body that do not complete the cell cycle
neurons
skeletal muscular cells
erythrocyte
List the 4 stages of Mitosis in order
Prophase, metaphase, anaphase, telophase
what stage do the chromosomes line up at the equator
Metaphase
what stage do the chromosomes first appear
Prophase
In what stage does the nuclear membrane disappear
Prophase
what stage are 2 indentical diploid nuclei produced
Telophase
What stage are the sister chomatid ripped apart
anaphase
What type of cell does mitosis happen
Somatic (2n)
What 3 things happen in meiosis and not mitosis
- synaposis
- crossing-over
- skipping interphase (replication
what cells undergo meiosis
Germ cells (Gametes)
How many chromosome are in a nucleis of meiosis
23
What is the term that describes a cell with 2 sets of chromosomes
diploid (mitosis)
What is the term that describes a cell with one set of chromosomes
haploid (meiosis)
Cellular Respiration Equation
Glucose + Oxygen = 36 ATP + Carbon Dioxide + Water + Heat
Glycolysis
Products: 2 net ATP, NADH, Pyruvate, and Electrons
In the Cytoplasm
Anareobic
Krebs Cycle
Products: 2 ATP, Carbon dioxide, NADH, Electron, FADH2, and Citric acid
Mitochondria Matrix (between 1st and 2nd layer)
Aerobic
Electron Transport Chain
Products: Heat, Water, 26-32 ATP
Inner Mitochondria Membrane
aerobic
Hydrogen ions need to pass through ___________ to signal it to add a phosphate group to ADP to make ATP
ATP Synthase
Fermentation
When there is not enough oxygen present
Creates 2 ATP and Lactic Acid
Where and when does DNA replication happen
In the nucleus during S-Phase
DNA is composed of 20,000-20,500 segments called
genes
The 4 Nitrogen Bases
A-Adenine
T-Thymine
G-Guanine
C-Ctyosine
DNA is _____ nucleotide pairs long
3 billion
Gene
are on your DNA and contain info to make protein
Another name for protein synthesis
Gene expression
Genes will turn on and off based on the ________ around
chemicals
What are the two steps of Protein synthesis in order
- Transcription
- Translation
Transcription
When one gene is copied into m-RNA and happens in the nucleus
Translation
When the m-RNA is read by the t-RNA to assemble a protein at the ribosome in cytoplasm. t-RNA leaves the anti codon with the codon and gets another amino acid this cycle repeats for amino acids to build up.
m-RNA are read in segments of three that codes for amino acids called
codon
what hold amino acids together
peptide dond
What is the starter codon
AUG (methionine)
what are stop codons
UAA, UGA, UAG
RNA polymerase
important enzyme in protein synthesis that breaks hydrogen bonds between nucleotide to unzip DNA and form complementary mRNA strand.
3 differences between DNA and RNS
DNA is two strands and RNA is one
DNA’s bases are A,T,G,C and RNA is A,U,G,C
DNA contains info for all geno,e and RNA is one gene
Messenger RNA contain info to
make a specific protein
DNA stands for
Deoxyribonucleic acid
RNA stands for
Ribonucleic acid
the nitrogen base U stands for
Uracil
Are enzymes consumed in their function
no
Substrate
Any substance that binds to a enzyme
Anabolic reaction
build large molecules from small ones
Catabolic reaction
breakdown of large molecules to small ones
Enzymes
proteins that work by lowering the activation energy and speed the rates of chemical reactions.
What factors alter/denature enzymes
exposure to heat radiation, electricity, fluids with extreme PH levels, and certain chemicals
An enzyme’s _________ allows it to recognize its substrate
conformation
A sequence of enzyme-controlled reactions is
metabolic pathways
Cells can only capture ____ of energy released from bonds
40%
Centromere
protein disc that hold homologous chromosomes together
Centrioles
Organelles built of microtudes that move chromosomes within a nucleus