WorksheetsChemistry of Life
Total questions: 19
Worksheet time: 10mins
What scientific knowledge about macromolecules is a direct result of Gerardus Johnannes Mulder’s 1838 discovery?
All proteins contain carbon, hydrogen, oxygen, and nitrogen.
All carbohydrates contain carbon, hydrogen, and oxygen.
Nucleic acids are polymers with nucleotide monomers.
The helical structure of DNA is essential for protein production.
Where does a peptide bond form?
between the five-carbon sugar of one nucleotide and the phosphate group of another nucleotide
between the R group of one amino acid and the carboxyl group of another amino acid
between the amino group of one amino acid and the carboxyl group of another amino acid
between the nitrogenous base of one nucleotide and the phosphate group of another nucleotide
A Venn diagram can be used to compare and contrast nucleic acids.
Which characteristic would be correctly found in B?
contain ribose
consist of two strands
made of nucleotides
have an R group
Which recent discovery led to a new understanding of how genetic mutations increase the risk of cancer?
double helix structure of DNA
BRCA1 and BRCA2 genes
nucleic acid monomers
formation of tumor suppressor proteins
The diagram shows a simple lipid.
What type of lipid is shown?
saturated
unsaturated
phospholipid
triglyceride
What type of lipid is estrogen?
steroid
phospholipid
triglyceride
wax
What would most likely happen to plants if they did not have a waxy outer coating?
They would store more water in their leaves.
They would photosynthesize at a faster rate.
They would store more sugars in their leaves.
They would be harmed by insects and UV radiation.
The diagram shows a straight chain of glucose molecules.
Which carbohydrate is shown above?
fructose
sucrose
galactose
starch
Which food contains mostly polysaccharides?
cake
sugar
berries
pasta
In which part of the body is glycogen stored?
liver
blood
pancreas
exoskeleton
Lactose (milk sugar) is a carbohydrate that is formed by combining galactose and glucose.
Which term best describes this molecule?
monosaccharide
disaccharide
monomer
starch
The diagram shows two water molecules.
What does the dotted line between the water molecules represent?
a polar bond
a covalent bond
a hydrogen bond
an electronegative bond
By which process does water vapor become a cloud?
evaporation
transpiration
condensation
precipitation
Sublimation is the opposite of deposition just as evaporation is the opposite of
fusion
transpiration
freezing
condensation
What would happen to life on Earth if all the liquid fresh water were used up?
All organisms would adapt to using salt water.
Organisms would carry out life functions without water.
Animals would be affected, but some desert plants would survive.
Life could no longer exist on Earth.
A scientist is working with methane (CH4) and butane (C4H10). Which statement best compares these chemicals?
They are two different types of molecules that each contain the same number of atoms.
They are two different types of atoms that are each made up of a different number of elements.
They are compounds made of the same two elements, but each contain different numbers of atoms.
They are matter made of the same two compounds, but each contain different types of elements.
There are more hydrogen atoms in living organisms than any other atom, but oxygen is more abundant in terms of mass.
Why is this statement true?
Hydrogen is a gas, but oxygen is a solid.
Hydrogen atoms have a lower mass than oxygen atoms.
Hydrogen atoms make up more of water's mass than oxygen atoms.
Hydrogen is present as single atoms and oxygen is bonded in compounds.
A doctor suspects that one of her patients has a deficiency in one of the six key elements found in living organisms. He has low energy and extremely weak, soft bones.
Based on this information alone, which nutrient supplement will she most likely prescribe?
phosphorus
zinc
sodium
sulfur
Read the following information from a Material Safety Data Sheet (MSDS) about the chemical hydrochloric acid (HCl).
“Skin Contact: In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Thoroughly clean shoes before reuse. Get medical attention immediately.”
Based on this information, which is the most important thing to do right away if a student spills HCl on his shirt?
Remove the shirt, and rinse the skin with water.
Remove the shirt, and find a sink to rinse it in.
Get help from a classmate immediately.
Call 911 to get medical attention immediately.
