NEW
Font size
WorksheetsRevision Chapter 1
Total questions: 25
Worksheet time: 13mins
Hydrogen and oxygen in water are bonded by?
non polar covalent bond
polar covalent bond
ionic bond
hydrogen bond
What is the attraction between one partial negative end of a water with one partially positive end of a water is called?
hydrogen bonds
a covalent bond
an ionic bond
a van der Waals interaction
Water is 'polar' because
Water has a slightly negative charge overall
Water has a slightly positive charge, but only as a liquid
Water has no evident charge, unless in sold form
The oxygen atoms is partially negative while the hydrogen atoms is partially positive
Which is the property of water
high viscosity
low specific heat capacity
high latent heat of vaporization
non polar molecule
Carbohydrates that are made up of chains of sugar units are called
polysaccharides
complex carbohydrates
monosacharides
monosaccharides
The molecule below is
fructose
ß-glucose
galactose
α-glucose
Explain the relationship between dehydration (condensation) reactions and hydrolysis?
Dehydration reactions assemble polymers; hydrolysis reactions break polymers apart.
Dehydration reactions eliminate water from membranes; hydrolysis reactions add water to membranes.
Dehydration reactions and hydrolysis reactions assemble polymers from monomers.
Hydrolysis reactions create polymers and dehydration reactions create monomers
The chemical formula for glucose molecule
C₁₂H₁₂O₁₂
Ｃ₆Ｈ₁₂Ｏ₆
C₁₂H₆O₁₂
C₆H₆O₆
Identify the molecule in the figure below
α-glucose
ß-glucose
maltose
cellulose
Identify the molecule in the figure below
cellulose
ß-glucose
fructose
maltose
Identify the types of lipid in the figure below
Oil
Fat
Phospholipid
Cholesterol
Why are hydrocarbons insoluble in water?
They are less dense than water.
The majority of their bonds are non-polar covalent carbon-to-hydrogen linkages.
The majority of their bonds are polar covalent carbon-to-hydrogen linkages.
They exhibit considerable molecular complexity and diversity.
Cooking oil is not amphipathic molecules because they
do not have a polar or charged region
are highly reduced molecules
do not have a nonpolar region
have hydrophobic and hydrophilic regions
Why vegetable oil is a liquid at room temperature while animal fats are solid?
Animal fats have no amphipathic character.
Vegetable oil has longer fatty-acid tails than animal fats have.
Vegetable oil has fewer double bonds in hydrocarbon chains than animal fats.
Vegetable oil has more double bonds in hydrocarbon chains than animal fats
How do phospholipids interact with water molecules?
Phospholipids dissolve in water.
Phospholipids do not interact with water because water is polar and lipids are nonpolar.
The polar heads avoid water; the nonpolar tails attract water (because water is polar and opposites attract)
The polar heads interact with water; the nonpolar tails do not.
Saturated fats _____.
contain no double bonds in the carbon chains
usually liquid at room temperature
have many double bonds in the carbon chains of their fatty acids
are common in plants than in animals
Two functional groups are always found in amino acids
amino and sulfhydryl groups
hydroxyl and carboxyl groups
carbonyl and amino groups
carboxyl and amino groups
What component of amino acid structure varies among different amino acids?
the presence of a central C atom
the glycerol molecule that forms the backbone of the amino acid
the long carbon-hydrogen tails of the molecule
the components of the R-group
Name the molecule in the figure
Phosphate group
RNA
Nucleoside
Nucleotide
Name the components of nucleotide attached to carbon no. 1 of the pentose sugar
Nucleotide
Phosphate group
Nitrogenous base
Ribose
Identify the pentose sugar in the figure
Deoxyribose
Ribose
Fructose
Glucose
Name the polymer formed from condensation of ribonucleotides
DNA
RNA
Lipid
Protein
The twisted ladder shape of DNA is called a
hydrogen twist
double helix
deoxyribose flip
double membrane
In what ways can we identify the sugar in DNA and RNA
Presence or absence of oxygen at carbon no. 3
Presence or absence of oxygen at carbon no. 2
Presence or absence of oxygen at carbon no. 1
Presence or absence of oxygen at carbon no. 4
What is the difference between DNA and RNA?
DNA uses uracil, but RNA uses thymine
RNA has deoxyribose, but DNA has ribose
RNA is double stranded, but DNA is single stranded
RNA is single stranded, but DNA is double stranded
