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General Biology Ch.1-4 Exam 1 review Flashcards | StudBud
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General Biology Ch.1-4 Exam 1 review
General Biology Ch.1-4 Exam 1 review
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1
What does not occur in all cells?
Ribosome which synthesis proteins
Cytoplasm --made of cytosol in which other components of the cell are found
A nucleus to house genetic material
An enclosing plasma membrane -- separates the cell's interior from the env
2
Which subatomic particle has a positive charge?
neutron
ion
proton
electron
3
Plant cells differ from animal cells bc they have:
Cell walls and chloroplasts
Nuclei
Mitochondria
Ribosomes
4
Which is an example of hydrolysis reaction?
Storing glucose as glycogen
Synthesizing lipids
Splitting a disaccharide into two monosaccharides
Joining amino acids to form a protein
5
During exercise, lactic acid builds up in muscle cells. What process is responsible for this buildup?
Osmosis
Aerobic respiration
Fermentation
Protein synthesis
6
A runner collapses due to dehydration. How does this affect cellular function?
Enzyme activity will increase
The nucleus will fail to divide
Cells will shrink due to water loss
Proteins will denature
7
The property of water that allows it to stick to other surfaces is called:
Polarity
Surface tension
Cohesion
Adhesion
8
The element needed to form hemoglobin is:
Potassium
Iron
Sodium
Calcium
9
A plant cell is unable to produce chlorophyll. What process will be directly affected?
DNA replication
Cellular Respiration
Photosynthesis
Protein Synthesis
10
A cell is placed in a hypertonic solution. Predict what will happen to the cell:
It will shrink
It will remain unchanged
It will swell
It will divide
11
In a hypotonic solution, a cell will:
Lose water
Shrink
Stay the same size
Swell and potentially burst
12
A cell lacking ribosomes cannot:
Synthesis proteins
Carry out osmosis
Generate energy
Divide
13
Plants, fungi, and bacteria all have:
mitochondria
chloroplasts
nuclei
cell walls
14
A biologist observes that an enzyme functions faster in warm temperatures but slows down when overheated. What is likely
The enzyme loses its substrate
The enzyme’s shape adapts to extreme heat
The enzyme denatures at high temperatures
The enzyme requires more substrate at high temperatures
15
Which of the following is a saturated fat?
Fish oil
Corn oil
Olive oil
Butter
16
What type of bond forms between water molecules?
Hydrogen
Metallic
Covalent
Ionic
17
Which organelle modifies, sorts, and packages proteins?
Nucleus
Endoplasmic reticulum
Lysosome
Golgi apparatus
18
Lipids are unique bc they are:
Acidic
Ionic
Hydrophilic
Nonpolar
19
The distinctive feature of chloroplasts is that they contain a green pigment called:
Gram stain
hemoglobin
chlorophyll
keratin
20
The formula for Glucose is:
A
D
B
C
21
Which bond is broken when water evaporates?
Peptide
Ionic
Covalent
Hydrogen
22
the primary components of cell membranes are:
Phospholipids and proteins
Lipids and nucleotides
Proteins and carbohydrates
DNA and RNA
23
A phosphorus shortage in soil would make it difficult for plants to produce:
DNA
amylose
starch
cellulose
24
Which of the following is the control group?
control group is kept in an unchanging environment
Left alone by the experimenters
an optional experimental variable
It is matched wit the experimental group except for one experimental variab
25
Prokaryotic cells are smaller than Eukaryotic cells. What is a plausible explanation?
Eukaryotic cells have compartmentalization, allowing specialization
Prokaryotes have more diverse energy sources
Prokaryotic cell wall limit their growth
Eukaryotes are immobile allowing them to grow larger
26
Organic molecules must contain:
Hydrogen and oxygen
Oxygen and nitrogen
Nitrogen and phosphorus
Carbon and hydrogen
27
If a cell’s mitochondria are damaged, what is the most likely result?
Loss of genetic material
Reduced energy production (ATP)
Decreased protein synthesis
Increased waste accumulation
28
Which of the following statements is not true
Water is essential for life
Water is the most abundant molecule In the atmosphere
29
Which macromolecule is most abundant in muscle cells?
Proteins
Nucleic acids
Carbohydrates
Lipids
30
Which organelle produces ATP?
Chloroplast
Nucleus
Ribosome
Mitochondria
31
A polymer with the sequence 5' ACGTACGAATAG 3' is a
piece of DNA
protein
piece of RNA
polysaccharide
32
A student places red blood cells in pure water. What will likely happen to the cells?
They will burst (lyse)
They will shrink
They will remain the same size
They will divide rapidly
33
Which structure regulates the entry and exit of substances into the cell?
Plasma membrane
Nucleus
Endoplasmic reticulum
Cytoplasm
34
Which of the following is NOT a macromolecule?
Glucose
Lipid
DNA
Protein
35
What is the primary function of ribosomes?
Genetic Storage
Protein synthesis
Lipid transport
Energy production
36
Biological membranes contain bilayers containing mostly
cholesterol
phospholipids
oils
prostaglandins
37
Why are unsaturated fats typically liquid at room temperature while saturated fats are solid?
A. Unsaturated fats have fewer double bonds
C. Unsaturated fats have kinks in their structure due to double bonds
B. Saturated fats are hydrophobic
D. Saturated fats contain fewer hydrogen atoms
38
______ and ______ are the monomers that make up fats (type of lipid)
Glycerol, proteins hat W
Fatty acids, polypeptides
Glycerol, phospholipids
Fatty acids, glycerol
39
Which macromolecule is primarily responsible for storing genetic information?
Nucleic Acids
Lipids
Proteins
Carbohydrates
40
An experiment shows that water can travel up narrow tubes against gravity. What property of water explains this?
Polarity
Cohesion
Surface tension
Adhesion
41
Which of the following is an example of a polysaccharide?
Lactose
Glycogen
Glucose
Fructose
42
Which macromolecule provides long term energy storage?
Proteins
Lipids
Carbohydrates
Nucleic acids
43
Which organelles would be present in high numbers in the leg muscles of a marathon runner?
chloroplasts
peroxisome
mitochondria
centrioles
44
Which organelle is most abundant in liver cells involved in detoxification?
Lysosome
Ribosome
Golgi apparatus
Smooth endoplasmic reticulum
45
Lysosomes are responsible for:
Photosynthesis
Digesting cellular waste
Protein synthesis
Cellular respiration
46
The smallest unit of life is:
Cell
Organelle
Tissue
Atom
47
What is the correct order of carbohydrate molecules from smallest (monomer) to largest (polymer)?
disaccharides, polysaccharides, monosaccharides
disaccharides, monosaccharides, polysaccharides
monosaccharides, disaccharides, polysaccharides
polysaccharides, disaccharides, monosaccharides
48
A toxin prevents the formation of phospholipids. Which structure would be most affected?
Cell wall
Plasma membrane
DNA
Mitochondria
49
Which molecules is polar?
methane
water
50
The rough endoplasmic reticulum is involved in:
Lipid synthesis
DNA replication
Protein transport
Energy production
51
How many electrons does group 14 need to fill their valence electron shell?
1
5
4
6
52
Which macromolecule would a long-distance runner rely on for quick energy during a race?
Lipids
Nucleic Acids
Proteins
Carbohydrates
53
The smallest particle of an element is:
Molecule
Proton
Neutron
Atom
54
A chemical reaction that absorbs energy is called:
Exergonic
Endergonic
Catalytic
Neutral
55
A wood desk was once a tree, but after being cut down its tissues died. Now, it only exhibits what property of life?
Homeostasis
Sensitivity
Organization
Metabolism
56
In osmosis, water moves:
Against its concentration gradient
From high to low solute concentration
Toward a higher solute concentrations
From low to high water concentration
57
What does cell B likely have when compared to cell A?
B
C
D
A
58
Which organelle is known as the "powerhouse of the cell"?
Nucleus
Golgi apparatus
Ribosome
Mitochondria
59
Cellulose and starch are examples of
polysaccharides
lipids
proteins
disaccharides
60
The pH scale measures:
The amount of oxygen in a solution
The molecular weight of compounds
The acidity or basicity of a solution
The temperature of a liquid
61
Why are phospholipids ideal for cell membranes?
They store energy effectively
They have polar heads and nonpolar tails
They provide structural rigidity
They are nonpolar and hydrophilic
62
A circular molecule of DNA is devoid of any histone proteins describes the chromosome of:
insects
yeasts
bacteria
flowering plants
63
The a-helix and b-pleated sheet is apart of which protein structure?
Tertiary
Primary
Quintuplet
Secondary
64
patient has genetic mutation it affects hemoglobin protein. What macromolecule affected, what might this mean for oxygen
Nucleic acids; impaired genetic expression
Proteins; reduced oxygen transport
Carbohydrates; increased oxygen transport
Lipids; decreased energy storage
65
Gluten is a group of which macromolecule
Carbohydrate
Lipids
Protein
Nucleic Acids
66
DNA and RNA differ because:
DNA is single-stranded; RNA is double-stranded
DNA has thymine; RNA has uracil
DNA contains ribose; RNA contains deoxyribose
DNA is made of proteins
67
The primary function of carbohydrates is:
Catalysis of reactions
Structural support
Energy storage and supply
Genetic storage
68
How many electrons does group 17 need to achieve stable electron configuration?
5
0
1
6
69
Why are hydrogen bonds important in biology?
They make molecules hydrophobic
They ate the strongest bonds in molecules
They stabilize DNA and protein structures
They form strong covalent bonds
70
A researcher extracts DNA from a cell and notices it is heavily damaged. Which organelle is malfunctioning in the cell?
Mitochondrion
Nucleus
Ribosome
Lysosome
71
A diet lacking essential amino acids can lead to which issue?
Dehydration
Poor energy storage
Increased fat accumulation
Impaired protein synthesis
72
Which type of bond is found between amino acids in a protein?
Glycosidic bond
Peptide bond
Hydrogen bond
Ionic bond
73
Carbohydrates polymers are formed of structural units (monomers) called:
amino acids
glycerol
monosaccharides
fatty acids
74
Which property of water helps regulate Earth's temperature?
Polarity
Adhesion
High specific heat
Surface tension
75
researchers identify a molecule with sugar, phosphate group, & nitrogenous base What is the molecule & primary function?
Lipid; membrane structure
Protein; energy storage
Nucleotide; genetic information storage
Carbohydrate; quick energy
76
The plasma membrane is described as:
Rigid and flexible
Fully permeable
Semi-permeable
Rigid and impermeable
77
A cell needs to rapidly transport sodium ions against their concentration gradient. Which cellular process is used?
Osmosis
Active transport
Facilitated diffusion
Diffusion
78
Which of the following is not a functional group that can bond with carbon?
carbonyl
sodium
hydroxyl
phosphate
79
Which of these are phosphate groups? (all of the above?)
T- Thyamine
C- Cytosine
A- Atinine
G- Guanine
80
The chemical bond where electrons are shared is:
metallic bond
covalent bond
ionic bond
hydrogen bond
81
Water is a polar molecule bc:
it lacks covalent bonds
there is unequal sharing of electrons
It is a non polar
it shares electrons equally
82
Which monomer produces proteins?
Nucleotides
Fatty Acids
Amino Acids
Monosaccharides
83
Scientists observe an enzyme only works within specific pH range What happens to enzyme if pH of environment changes?
It accelerates its reaction time
It denatures and loses activity
It becomes more efficient
It doubles the product output
84
What is the order of protein molecules from smallest to largest?
amino acids, protein, polypeptide
amino acids, polypeptide, protein
protein, amino acids, polypeptide
protein, polypeptide, amino acids
85
Atoms that vary in the # of neutrons found in their nuclei are called?
Ions
neutrons
Neutral atoms
Isotopes
86
A solution with a pH of 2 is:
Neutral
Alkaline
Acidic
Basic
87
What type of bond represents a weak chemical bond?
covalent bond
atomic bond
non polar covalent bond
hydrogen bond
88
Enzymes are a type of:
Lipid
Carbohydrate
Nucleic Acid
Protein
89
We call a molecule that binds up excess hydrogen ions in a solution a(n)
isotope
base
acid
donator
90
The cytoskeleton provides:
Structural support
Genetic material
Waste disposal
Energy
91
A mutation causes a cell’s lysosomes to malfunction. Which of the following consequences is most likely?
Cell communication fails
Protein production halts
ATP synthesis stops
Harmful substances accumulate inside the cell