WorksheetsUnit 1 Assessment - Biomolecules, Enzymes, Pro vs Euk Cells
Total questions: 15
Worksheet time: 1hrs 11mins
Choose the correct selection to fill in the blanks:
Very long and large organic molecules called 1.______ are made of small units called monomers. Examples of the small units include:
Monosaccharides, which combine to form 2.__________, also known as 3. __________ (sugars).
Nucleotides monomers, which combine to form 4._________; and
amino acids, which are monomers that form 5.________.
1. polymers
2. polysaccharides
3. carbohydrates
4. nucleic acids
5. proteins
1. polymers
2. polysaccharides
3. carbohydrates
4. proteins
5. nucleic acids
1. polysaccharides
2. polymers
3. nucleic acids
4. RNA and DNA
5. lipids
1. polysaccharides
2. polyproteins
3. proteins
4. lipids
5. nucleic acids
The cell walls of a plant consist mostly of cellulose, a carbohydrate, which provides a strong structure. The cell membrane gets its structure primarily from lipids, and embedded proteins allow for material transport. Which of the following elements would be found in the highest amounts in both the cell wall and cell membrane? (Select 3)
Hint: Remember CHO, CHO, CHON, CHONP
Carbon
Oxygen
Hydrogen
Sodium
A store sells a variety of sets for building molecular models. The sets are described by the diagram below. Each circled letter represents a set of 6 model atoms of one element. For example, the circled letter 'P' represents a set with 6 model phosphorus atoms. The dark circles are carbon.
Kendra wishes to build a model of a carbohydrate molecule, ideally containing as many monomers as possible. Which set should she choose?
Hint: Carbohydrates are made of carbon, hydrogen, and oxygen. Which set contains the most of these atoms only?
Set 1
Set 2
Set 3
Set 4
Which of the following are functions of lipids? Choose three correct answers.
Lipids form cell membranes.
Lipids form bones and cartilage.
Lipids form waxy leaf coverings.
Lipids store long term energy in fat cells.
Lipids form the exoskeletons of insects.
What are the effects of enzymes on chemical reactions? (Choose 3 answers).
Enzymes increase the heat of reaction.
Enzymes decrease the activation energy.
Enzymes increase the rate of the reaction.
Enzymes change the ideal pH for a reaction to proceed.
Enzymes are activated by binding a specific substrate.
Most enzymes are (a) . They speed up chemical reactions where substrates, also known as (b) , are converted to (c) . (d) lower the amount of energy required for a reaction to take place, known as the (e) .
_____
Many cells make and use an enzyme, called catalase, to facilitate the decomposition of hydrogen peroxide (H₂O₂). The products of the decomposition are water (H₂O) and oxygen (O₂). Which of these changes to the cell would cause the greatest reduction in the activity of the enzyme catalase?
Hint: Use the picture - which of the following would cause a decrease in enzyme activity?
A decrease in the concentration of hydrogen and oxygen
An increase in the concentration of hydrogen peroxide
An increase or decrease in pH beyond normal range
A return of pH to the normal range
Which of the following are true regarding enzymes? Select 3.
Enzymes are lipids that absorb energy in chemical reactions.
Enzymes speed up the rate that substrates are converted to products.
Enzymes can bind to any substrate.
Enzymes are proteins that catalyze chemical reactions.
According to the "lock and key" theory: Enzymes are only activated by a specific substrate.
Which are the main points of the cell theory? Select all that apply.
Cells are the basic units of structure and function in living things.
New cells are produced from existing cells.
All cells enclose their DNA within a nucleus.
All living things are made up of cells.
The invention of cell theory began with the invention of microscope. Which of the following instruments helped initiate cell theory?
The illustrations in the options are models of cells and cell organelles. Which model shows a prokaryotic cell?
A
B
C
D
Match the correct organelle with each cell type.
Eukaryotic Cell
Nucleus and membrane bound organelles
Prokaryotic cell
Capsule and Nucleoid
Both
DNA, Ribosomes, Cell Membrane
Choose the option that identifies the missing terms, in order of appearance in the sentences.
The instructions for making proteins are coded in the ___ of a cell. In a eukaryotic cell, these instructions are located in the ___.
DNA; nucleus
cytoplasm; cytoskeleton
ribosome; mitochondria
DNA; cytoplasm
endoplasmic reticulum; nucleus
What does it mean that cells are the basic units for structure and function of an organism?
Cells are really small
Cells are non-essential components of living organisms.
All processes and actions a living thing does come down to cellular activity
Cells come from preexisting cells.
Use the image of the Venn diagram to answer: Which of the following statements is true about viruses?
1. They are made of cells.
2. They require a living host to reproduce
3. They are not living organisms.
1 and 2
2 and 3
Only 2
Only 1
