2 chains Has deoxyribose sugars Never leaves the nucleus A-T, G-C Replicated in prep for cell division
During protein synthesis, what is the segment called that codes for a specific amino acid?
During protein synthesis, what is the segment on mRNA called that codes for a specific amino acid? Codon
What phase of the cell cycle does DNA replicate?
Which is NOT connective tissue? Bone Cartilage Blood Skeletal muscle Adipose
Which is NOT connective tissue? Skeletal muscle
What are the 3 types of muscle and where are they found?
Skeletal-attached to bones Cardiac-heart Smooth-digestive system
“Cell skeleton” is made of microtubules, intermediate filaments, and microfilaments is called the __________.
“Cell skeleton” is made of microtubules, intermediate filaments, and microfilaments is called the cytoskeleton.
What is the difference between endocytosis and exocytosis?
Endocytosis=take into the cell Exocytosis=out of the cell
If a cell has a tail the tail is called a _________.
If a cell has a tail the tail is called a flagella.
Facilitated diffusion requires a _______ ________.
Facilitated diffusion requires a protein channel/molecule.
Know the function of each of these organelles/cell structures Centriole Mitochondria Ribosome Lysosome Microtubule Golgi Nucleolus Microvilli
Know the function of mRNA, rRNA, DNA, proteins
List the 3 different types of RNA and their functions ◦ mRNA (Messenger)-carries message containing info for protein synthesis from DNA in nucleus to ribosome ◦ rRNA (ribosomal)-forms ribosomes and coordinates protein synthesis ◦ tRNA (transfer)-transports amino acids to ribosome and recognizes the mRNA codons
Discuss 3 steps of protein synthesis 1. Uncoil DNA 2. Transcription (DNA mRNA) ◦ Genes code for specific proteins ◦ mRNA forms complementary strand with codons that code for specific amino acids 3. Translation (RNA directed synthesis of protein) ◦ mRNA travels to ribosome ◦ Ribosome “reads” codons ◦ Corresponding tRNA brings amino acids ◦ Amino acids bond together to form a protein
Discuss the 6 stages of cell division ◦ Interphase-cell growth, DNA copied ◦ Prophase-Chromosomes are 2 strands of chromatid, held together by centromere. Centrioles move to opposite ends of cells and form mitotic spindle ◦ Metaphase-chromosomes align in middle of cell ◦ Anaphase-centromeres split and chromosomes move toward opposite ends of cells ◦ Telophase-chromosomes reach opposite ends of the cell, uncoil and become chromatin again. Nuclear membrane reforms ◦ Cytokinesis-organelles and cytoplasm split between 2 new cells.