Why is water a good solvent?

It is small and entirely polar.

Name four of the most important atoms in biology.

Carbon, oxygen, hydrogen, nitrogen

The Lewis structure shows?

Answer 1 and 2 are both correct.

What are the four major macromolecules in the body?

Proteins, lipids, carbohydrates, nucleic acids

Bonds are considered ionic if?

The atoms have an electronegativity of over 1.7.

When biological monomers are assembled into macromolecules, is water consumed or released?

Released, dehydration synthesis

What is electronegativity? The important highly electronegative element in biology is?

Greediness for electrons, oxygen.

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BIOL 2730 Chapter 02

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A #BIOL2730 #microbiology exam review for #Sassanella

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Questions 20

Answers

1
What are the two secondary structures of proteins?
Gamma-helix, beta-sheet
None of the choices are correct.
Beta-helix, alpha-sheet
Alpha-helix, beta-sheet
2
Which component of atoms is responsible for radioactivity? Chemistry?
Neutrons, protons
Neutrons, electrons
Protons, electrons
Protons, electrons, neutrons
3
A measurement of acidity or alkalinity?
Acidity and alkalinity cannot be measured.
pH
Test strips
Temperature
4
Elements become radioactive if they are imbalanced in?
Protons
Elements cannot become radioactive.
Electons
Neutrons
5
Why is water a good solvent?
It is large and entirely nonpolar.
It is small and entirely nonpolar.
It is small and entirely polar.
It is large and entirely polar.
6
Name four of the most important atoms in biology.
Oxygen, hydrogen, carbon, phosphorus
Carbon, oxygen, hydrogen, nitrogen
Carbon, oxygen, phosphorus, sulfur
Carbon, oxygen, hydrogen, sulfur
7
The most common element in the body by weight is?
Hydrogen
Carbon dioxide
Oxygen
Phosphorus
8
The most numerous element in the body by weight is?
Carbon dioxide
Phosphorus
Hydrogen
Oxygen
9
The Lewis structure shows?
How many bonds can form.
Answer 1 and 2 are both correct.
None of the above.
How many electrons are in the outer shell.
10
The atomic mass number represents?
Protons + neutrons + electrons
Electrons + neutrons
Protons + electrons
Protons + neutrons
11
What are the four major macromolecules in the body?
Glucose, mannose, galactose, fructose
Proteins, lipids, carbohydrates, amino acids
monosaccharides, disaccharides, polysaccharides, fructose
Proteins, lipids, carbohydrates, nucleic acids
12
Bonds are considered ionic if?
The atoms have an electronegativity of over 1.
The atoms have an electronegativity under 1.7.
The atoms have an electronegativity of over 1.7.
The atoms have an electronegativity of over 10.
13
When biological monomers are assembled into macromolecules, is water consumed or released?
Consumed, hydrolysis
Released, dehydration synthesis
Consumed, dehydration synthesis
Released, hydrolysis
14
The cellular energy currency?
ADP
Nucleus
ATP
Electricity
15
What are two qualities that allow biological molecules to bind to one another?
Size and color
Shape and charge
Shape and size
Size and charge
16
What molecule helps maintain cell membrane fluidity?
Glycerol
Alcohol
Cholesterol
Water
17
What type of bond is represented by the nearly equal sharing of electrons?
Ionic bond
Magnetic bond
Hydrogen bond
Covalent bond
18
What is electronegativity? The important highly electronegative element in biology is?
Greediness for neutrons, oxygen.
Greediness for neutrons, carbon dioxide.
Greediness for electrons, carbon dioxide.
Greediness for electrons, oxygen.
19
The cell membrane is primarily composed of?
Amino acids
Lipids
Protein
Phospholipids
20
RNA contains only which nucleobases?
C, G, A, U
C, A, U, T
C, G, A, T
C, G, U, T

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