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WorksheetsIB Biology Q3 Review
Total questions: 59
Worksheet time: 30mins
Which evidence falsifies the Davson-Danielli model?
The presence of globular proteins with the phospholipid bilayer
Non-polar amino acids cause proteins to remain embedded in membranes
Membranes proteins remain in a fixed position inside a membrane
A
B
C
D
Which organelle is involved in generating vesicles destined for the cell membrane?
Golgi apparatus
smooth endoplasmic reticulum
rough endoplasmic reticulum
lysosome
A
B
C
D
Pancreatic gland cells produce and secrete large amounts of digestive enzymes (proteins). Which organelles would you expect to be present in higher than normal amounts in such cells?
free ribosomes and Golgi apparatus
rough endoplasmic reticulum and lysosomes
rough endoplasmic reticulum and Golgi apparatus
free ribosomes and lysosomes
The giant alga Acetabularia has a feature that suggests it is an exception to cell theory. What feature is this?
it lacks a nucleus
it lacks a cell wall
it has only one mitochondrion
it lacks subdivision into separate cells
The image shows an electron micrograph of mesophyll cells. What is the name of the structure labelled X?
cytoplasm
mitochondrion
nucleus
chloroplast
The image shows an electron micrograph of pancreatic exocrine cells. What is the role of the vesicles shown in the micrograph?
To transport hormones between the rough endoplasmic reticulum and the Golgi apparatus
To store glycogen when blood glucose levels are high
To move enzymes out of the cell by exocytosis
To digest cellulose
What is evidence for the endosymbiotic theory?
RNA can catalyze metabolic reactions.
Meteorites contain organic molecules.
Amino acids can be synthesized from inorganic compounds.
Mitochondria possess their own DNA.
Which can be explained by the solvent properties of water?
Sodium chloride is transported as NA+ and Cl- in blood.
Movement of water occurs under tension in the xylem.
Water is the coolant in sweat.
Ice floats on liquid water.
What is a role of cholesterol in animal cells?
It increases body fat.
It controls membrane fluidity.
It lines the inner wall of capillaries.
It is a constituent of bile.
The graph shows the survival probabilities for current smokers and for those who never smoked among women 30 to 80 years of age. What can be deduced from this graph?
There is a correlation between smoking and cancer.
Smoking reduces life expectancy.
Smoking causes cancer.
70% of smokers survive to 80 years old.
Why is sweat a good coolant for the body?
The arterioles that transfer water to sweat move closer to the skin surface when it is hot.
Breaking H bonds between water molecules in sweat requires energy from body heat.
Sweat contains minerals such as sodium chloride.
Sweat is non-polar.
What is the process shown in this image?
Binary fission of a prokaryotic cell
Telophase in a eukaryotic cell
End of mitosis in a prokaryotic cell
Cytokinesis of a eukaryotic cell
What can be deducted about a striated muscle fiber from both of these statements:
"A eukaryotic cell has one nucleus."
"A striated muscle fiber has many nuclei."
The cell is prokaryotic.
The cell is an exception to cell theory.
The cell consists of aseptate hyphae.
The cell is preparing to divide.
Which statement is true for the antibiotic penicillin?
Watson and Crick developed the usage of penicillin.
Penicillin blocks processes unique to eukaryotic cells.
Viruses lack metabolism and penicillin has no effect on them.
Florey and Chain sequenced the genome of Penicillium notatum.
What distinguishes prokaryotic cells and eukaryotic cells?
prokaryotic cells: cell wall
eukaryotic cells: plasma membrane
prokaryotic cells: cell structure not compartmentalized
eukaryotic cells: cell structure compartmentalized
prokaryotic cells: smooth endoplasmic reticulum
eukaryotic cells: rough endoplasmic reticulum
prokaryotic cells: no ribosomes
eukaryotic cells: ribosomes present
This statement relates to Pasteur's experiments.
In his experiments, Louis Pasteur demonstrated that:
- if broth was boiled to kill all organisms and was then kept in swan-necked flasks, preventing the entry of organisms, no organisms grew in the broth
- if the swan-necked flask was broken, mold soon started to grow in the broth.
What did this statement suggest?
mold evolved by endosymbiosis
oxygen is required for anaerobic respiration
cells can only be formed by division of pre-existing cells
nutrients are a requirement for mold growth
Which of the following are associated with mitosis?
I. Tissue repair
II. Growth
III. Asexual reproduction
I and II only
I and III only
II and III only
I, II, and III
I. Re-formation of nuclear membranes
II. Pairing of homologous chromosomes
III. DNA replication
What prevents antibiotics from being effective against viruses?
Viruses have a high rate of mutation.
Viruses have no RNA.
Viruses have no metabolism.
Viruses have a protein shell that protects them.
A polymer of alpha-D-glucose found in plants has mostly 1,4 linkages and some 1,6 linkages. Which molecule fits this description?
glycogen
cellulose
amylose
amylopectin
What type of molecule is shown in this diagram?
trans saturated fatty acid
cis unsaturated fatty acid
cis saturated fatty acid
trans unsaturated fatty acid
Glucose is absorbed through protein channels in the plasma membrane of epithelium cells in the small intestine. Which characteristics of glucose prevent its diffusion through the phospholipid bilayer?
it is non-polar and therefore hydrophobic
its hydrogen bonds link with amino acids in the protein channel
it is polar and therefore hydrophilic
its covalent bonds interact with the phospholipids
What characteristic shows that this steroid molecule is a lipid?
it is made of carbon rings
it has a very low proportion of oxygen to carbon
it contains OH groups as do fatty acids
it is made only of nitrogen, oxygen, and hydrogen
The diagram shows the structure of palmitic acid. What type of fatty acid is palmitic acid?
it is monosaturated
it is polyunsaturated
it is saturated
it is a trans-fatty acid
Which molecule diagram corresponds to the name?
Which molecule is a sugar?
What molecule is a polysaccharide?
glucagon
glycose
glycerol
glycogen
Which substance is used for structure in plants?
amylopectin
cellulose
collagen
starch
In which compounds would a double bond link carbon to oxygen (C=O)?
I. amino acid
II. fatty acid
III. glycerol
I and II only
II and III only
I and III only
I, II, and III
That is the maximum number of fatty acids that can be condensed with glycerol?
one
two
three
four
Which described these molecules correctly?
I: ribose II: amino acid
I: glucose II: amino acid
I: ribose II: fatty acid
I: glucose II: fatty acid
Which of the following molecules is ribose?
In 1828, Friedrich Wöhler artificially produced urea (organic compound) by an internal rearrangement of the atoms of ammonium cyanate (inorganic compound). What important principal did this experiment show?
Organic compounds can be synthesized without the need of a vital force.
Organic compounds can only be formed from pre-existing inorganic compounds.
Inorganic compounds are essential for living organisms.
Organic compounds are more simple substances than inorganic compounds.
Which diagram represents the polarity of a water molecule?
What causes water to have a relatively high boiling point?
hydrogen bonds between water molecules
hydrogen bonds between hydrogen and oxygen within water molecules
cohesion between water molecules and the contain in which the water is boiled
covalent bonds between hydrogen and oxygen within water molecules
Which of the following is true about a polar amino acid and cellulose?
both are polysaccharides
both contain nitrogen
both are hydrophobic
both contain hydrogen atoms
Blood is a water-based transport medium. Which property of water makes it a good transport medium?
high specific heat
transparency
versatility as a solvent
it has its greatest density at 4o C
