Question

question 2

An atom with a partial negative charge is called a(n) ___

Group of answer choices

ion

electronegative atom

cation

electropositive atom

anion

Question 3

A chemical reaction in which bonds are broken is associated with

Group of answer choices

a release of energy

the consumption of energy

a synthesis

forming a larger molecule

both 1 and 3 are correct

all of the above are correct

Question 4

A ___ reaction involves bond formation

Group of answer choices

synthesis

catabolic

decomposition

anabolic

answers 1 and 4 are correct

answers 2 and 3 are correct

Question 5

True or false. Covalent bonds are more common than ionic bonds

Group of answer choices

True

False

Question 6

Select the statement that is most correct regarding chemical bonds

Group of answer choices

Covalent bonding involves the transfer of one or more electrons from one atom to another

Polar ionic are stronger than non-polar ionic bonds

Hydrogen bonds are very weak and often involve water

Ionic bonds involve sharing of electrons between two atoms

Question 7

Typically, nitrogen atoms are composed of seven electrons, seven protons, and seven neutrons. An isotope of nitrogen could:

Group of answer choices

be positively charged

be negatively charged

have more than seven electrons and more than seven protons

have more than seven neutrons

have more than seven each of electrons, protons, and neutrons

Question 8

A proteoglycan is:

Group of answer choices

a carbohydrate and protein compound

a lipid with carbohydrates attached

a single stranded nucleic acid

part of the cytoskeleton

Question 9

A triglyceride:

Group of answer choices

consists of fatty acids and glycerol

does not dissolve in water

plays a role in storage of energy

is a type of fat

all are correct

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Question 10

Not all proteins have a __ structure

a)Group of answer choices

b)tertiary

c)quaternary

d)secondary

e)primary

Answer 1

question 2

Answer:-electronegative atom

Explanation:- The more electronegative atom attracts electrons more strongly and gains a partially negative charge.

Question 3

Answer:- a release of energy

Explanation:- when a chemical reaction that comprises break in bonds releases energy and known as exothermic reaction.

Question 4

Answer:-answers 1 and 4 are correct

Explanation:- Synthesis reaction considered as anabolic and involves formation of bond.

Question 5

Answer:- True

Explanation:- Covalent type of bond is formed when atoms share electrons and when When positively and negatively charged ions attract each other, ionic type of bond is formed. Covalent bonds are more common than ionic bonds.

Question 6

Answer:-Hydrogen bonds are very weak and often involve water

Explanation:-Hydrogen bonds are very weak bon. These bonds are formed when the partially positive hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar covalent bond in another molecule.

Question 7

Answer:-have more than seven neutrons

Explanation:-Isotope is

atom of the same element which seems to have different numbers of neutrons. As nitrogen atoms are composed of seven electrons, seven protons, and seven neutrons, it's isotope could have have more than seven neutrons.

Question 8

Answer:-a carbohydrate and protein compound

Explanation:- In proteoglycan, there is protein compound conjugated to polysaccharides with serial repeat units (glycoprotein).

Question 9

Answer:-all are correct

Explanation:- Triglyceride made up of three fatty acids and glycerol. It is the main constituent of body fat in humans and animals and does not dissolve in water. Thus it plays a role in storage of energy.

Question 10

Answer:-quaternary

Explanation:-Not all proteins have quaternary structure, which only exists for proteins with more than one polypeptide chain.