Trimester 2 Unit 1

Question 1

Why are adenine, thymine, guanine, and cytosine called nitrogenous bases

Answer 1

they form nucleotides

Question 2

What atom is found in your DNA that is not found in carbohydrates, lipids, or in proteins

Answer 2

phosphate

Question 3

What are the atoms that make up the components of lipids

Answer 3

glycerol and phosphates

Question 4

What is the importance of lipid-soluble molecules, such as hormones, vitamins, and medications

Answer 4

needed to pass through the cell membrane phospholipid bilayer to activate specific metabolic processes

Question 5

Which cell organelle creates a protein (polypeptide) during protein synthesis

Answer 5

codon

Question 6

What molecule brings the amino acid to the ribosome

Answer 6

tRNA

Question 7

What’s the monomer of Carbohydrates

Answer 7

sugar molecules

Question 8

What’s the polymer of Carbohydrates

Answer 8

starch

Question 9

What’s the monomer of Lipids

Answer 9

fatty acid

Question 10

What’s the polymer of Lipids

Answer 10

glyceral

Question 11

What’s the monomer of Nucleic Acids

Answer 11

nucleotide

Question 12

What’s the polymer of Nucleic Acids

Answer 12

DNA and RNA

Question 13

What’s the monomer of Proteins

Answer 13

amino acids

Question 14

What’s the polymer of Proteins

Answer 14

polypeptide

Question 15

What do lewis dot structures help us do

Answer 15

they help us visualize how covalently bonded molecules are organized

Question 16

What do the dots represent

Answer 16

valence electrons

Question 17

A dot equals

Answer 17

1 ve- electron not bonded

Question 18

Lines equal

Answer 18

2 ve- electrons bonded

Question 19

What element goes in the middle

Answer 19

least electronegative

Question 20

What never goes in the middle

Answer 20

hydrogen

Question 21

What typically goes in the middle

Answer 21

carbon

Question 22

Where do single bonds go

Answer 22

between middle and outer element

Question 23

What is metallic bonding

Answer 23

based on the attraction of particles with unlike charge, share several properties with ionic compounds, the outer levels of metal atoms overlap

Question 24

How do metallic bonds conduct heat

Answer 24

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

Question 25

How do metallic bonds conduct electricity

Answer 25

when an electric field is applied to a metal, one end becomes positive and the other becomes negative.

Question 26

Why do metallic bonds have a higher melting point

Answer 26

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

Question 27

Why do metallic bonds have high density

Answer 27

metals have a high density because there is little empty space between atoms