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Flashcards in o chm and bio Deck (27):
0

the sex hormones estrogen, progesterone, and testosterone belong to which class of molecules?

Lipids - the sex hormones are lipids bcuz of their insolubility in H2O

1

When comparing saturated and unsaturated fats, the unsaturated fats have______ and are ______ at room temperature?

Cis dbl bonds and liquids

2

which of the following is a polymer?
1)Glucose 2)Cellulose 3) Triacylglycerol 4) Fructose

Cellulose

3

Nitrogen bases are classified as either purines or pyrimidines. ex of purines are?

Adenine and Guanine

4

_____ is always involved in hydrolysis

Water

5

Sugars are molecules tht have _____ C:H:O and are called _____?

1:2:1 ratio of; carbohydrates

6

The components of nucleic acids are _____?

Nitrogenous base, a pentose sugar, and phosphate

7

What type of bond forms while joining monomers?

covalent

8

At a conference, the speakers grand finale was sauteing mealworms. they wer crunchy because their exoskeletons contain polysacchride _____?

Chitin

9

Which type of protein shields a newly forming protein from cytoplasmic influences while its folding into its funtional form?
1) Antibodies 2) Receptor proteins 3) Enzymes 4) Fibrous proteins
5) Chaperonins

Chaperonins

10

A polysaccharide is used for storing energy in human muscle and liver cells is?

Glycogen

11

In dehydration synthesis rxn, _____ is always formed as a by product to the rxn?

water

12

Sickle-cell anemia is a disease tht is caused by ______ in the _______ of the protein?

a single amino acid change; primary structure

13

The secondary structure of a peptide backbone is stabilized by _______ forming either ______ or a ______?

H-Bond; alpha helix; beta pleated sheet

14

the sequence of aminos acids in a protein are called _____ structure of the protein?

Primary

15

One characteristic shared by sucrose, lactose, and maltose is tht _____?

they all are disaccharides

16

What are the four main classes of macromolecules , molecules of life?

Carbohydrates, Nucleic acids, Proteins, Lipids

17

In living organisms, DNA exists as a ______ with the strand(s) ______?

dbl helix , running antipar

18

In living organisms, DNA exists as a _____ with the strand(s) _____?

Dbl helix, running antiparellel

19

the lipids tht form the main structural component of cell membranes are?

Phospholipids

20

sugars have a ____ grp tht interacts with a _____ grp tht forms ring structures wen the dry molecule is placed in H2O.

Carbonyl R-C=O. hydroxyl R-OH

21

Protein molecules are polymers (chains) of _____?

Amino acid molecules

22

Carbohydrates are used in our bodies mainly for ______?

Energy storage and release

23

the molecule with 4 fused rings tht is found in animal membranes and is the precursor of vertebrate sex hormones is _____?

Cholesterol

24

The tertiary structure of a protein includes all of the following interactions except _____ bonds.
1) Disulfide bridge 2) Hydrophobic 3) Ionic 4) Hydrophilic 5) Peptide

Peptide

25

The proper 3D shape and folding of a protein is assisted by _____?

Molecules called Chaperonis

26

A shortage of phosphorus in the soil would make it especially difficult for plants to manufacture ____?

DNA