Trimester 2 Unit 1 Flashcards
Why are adenine, thymine, guanine, and cytosine called nitrogenous bases
they form nucleotides
What atom is found in your DNA that is not found in carbohydrates, lipids, or in proteins
phosphate
What are the atoms that make up the components of lipids
glycerol and phosphates
What is the importance of lipid-soluble molecules, such as hormones, vitamins, and medications
needed to pass through the cell membrane phospholipid bilayer to activate specific metabolic processes
Which cell organelle creates a protein (polypeptide) during protein synthesis
codon
What molecule brings the amino acid to the ribosome
tRNA
What’s the monomer of Carbohydrates
sugar molecules
What’s the polymer of Carbohydrates
starch
What’s the monomer of Lipids
fatty acid
What’s the polymer of Lipids
glyceral
What’s the monomer of Nucleic Acids
nucleotide
What’s the polymer of Nucleic Acids
DNA and RNA
What’s the monomer of Proteins
amino acids
What’s the polymer of Proteins
polypeptide
What do lewis dot structures help us do
they help us visualize how covalently bonded molecules are organized
What do the dots represent
valence electrons
A dot equals
1 ve- electron not bonded
Lines equal
2 ve- electrons bonded
What element goes in the middle
least electronegative
What never goes in the middle
hydrogen
What typically goes in the middle
carbon
Where do single bonds go
between middle and outer element
What is metallic bonding
based on the attraction of particles with unlike charge, share several properties with ionic compounds, the outer levels of metal atoms overlap
How do metallic bonds conduct heat
heat causes the electrons to move faster and the “bumping” of electrons that are free to move with each other and the protons transfer the heat
How do metallic bonds conduct electricity
when an electric field is applied to a metal, one end becomes positive and the other becomes negative.
Why do metallic bonds have a higher melting point
the melting points increase with an increase in the number of valence electron to the sea, since there is a grater attractive force between the cations and the electrons
Why do metallic bonds have high density
metals have a high density because there is little empty space between atoms
