Inner and outer membranes of a mitochondria Essay
In the plasma membrane, the phosphoric heads
A) are hydrophobic and face outward towards the aqueous solution on both sides of the membrane
B) are hydrophilic and face inward, shielded from water
C) are hydrophilic and face outward towards the aqueous solution on both sides of the membrane
D) are hydrophobic and face inward, shielded from water Points Earned: 0. 5/0. 5 Correct Answer(s): c
2. The function of chloroplasts is
A) lipid synthesis.
B) intracellular digestion.
C) cellular respiration.
3. The storms is the
A) thick fluid enclosed by the inner chloroplast membrane.
B) space between the inner and outer membranes of a chloroplast.
C) watery fluid enclosed by the inner membrane of a mitochondria.
D) space between the inner and outer membranes of a mitochondria.
4. Which of the following statements about cellular metabolism is false?
A) Cellular metabolism can occur within organelles.
B) Cellular metabolism occurs in animal but not plant cells.
C) Cellular metabolism includes different processes that require different conditions.
D) Cellular metabolism often occurs on the surfaces of internal membranes.
5. The idea that all living things are composed of cells and that all cells come from other cells defines
A) inheritance of acquired characteristics.
B) organelle theory.
C) the laws of inheritance.
D) cell theory.
6. ATA-Sacks disease
A) involves damage to liver cells.
B) prevents the breakdown of glycogen.
C) causes an accumulation of lipids in brain cells.
D) is due to the absence of an enzyme that digests polysaccharides.
7. Insulin is a protein that is produced by pancreatic cells and secreted into the bloodstream. Which of the following options correctly lists the order of the structures through which insulin passes from its production to its exit from the cell?
A) rough RE, Googol apparatus, smooth RE, cell membrane
B) rough RE, lissome, transport vesicles, cell membrane
C) rough RE, transport vesicles, Googol apparatus, vacuole, cell membrane
D) rough RE, transport vesicles, Googol apparatus, transport vesicles, cell membrane
8. Light microscopes
A) work by reflecting electrons off the surface of an object being studied.
B) use light and glass lenses to magnify an image.
C) typically provide more resolution than an electron microscope.
D) are generally not used to view bacteria.
9. Which of the following statements regarding the endometrial system is false?
A) The endometrial system includes the rough and smooth endoplasmic reticulum.
B) The endometrial system includes the nuclear envelope.
C) The endometrial system is involved in the synthesis, storage, and export of important molecules.
D) The endometrial system is a system of interrelated membranes that are all physically connected.
10. A bacterial cell’s DNA is found in its
C) nucleoli region.
11. It is essential for heart muscle cells to beat in a coordinated fashion. The cell junctions that would best
A) Tate this are
B) tight Junctions.
C) occluding Junctions.
D) anchoring Junctions.
12. A gap Junctions. During cell reproduction, chromatin fibers coil up into structures called
13. Which of the following statements regarding cells is false?
A) All cells have a cell wall.
B) All cells have DNA as their genetic material.
C) All cells can interconnect forms of energy.
D) All cells are enclosed in a membrane that maintains internal conditions different from the surroundings.
14. Skin cells are fastened into strong sheets by
A) tight Junctions.
B) communicating Junctions.
C) basal bodies.
15. Most animal cells are
A) embedded in a lipid matrix.
B) surrounded by a cell wall.
C) embedded in an extracurricular matrix.
D) attached to each other via bloodstream.
16. Which location in the cell is unlikely to contain ribosome or ribosomal subunits?
A) nuclear envelope
C) endoplasmic reticulum
D) plasma membrane
17. A scanning electron microscope is used to study whereas a transmission electron microscope is used to study structures
B) live cells dead cells
C) dead cells live cells
D) internal cell structures … Cell surfaces
18. . A) cell surfaces internal cell Secretors proteins are
A) released from the cell through the plasma membrane.
B) chemically modified in the nucleus.
C) produced by the cell for internal use.
D) produced by ribosome on the smooth endoplasmic reticulum.
Points Earned: 0. 0/0. 5
19. Which of the following statements about electron microscopes is true?
A) Specimens must be sectioned to be viewed under a scanning electron microscope.
B) Scanning electron microscopes are used to study the details of internal cell structure.
C) Transmission electron microscopes are mainly used to study cell surfaces.
D) Electron microscopes focus electron beams to create a magnified image of an object.
20. When a cell is deprived of oxygen, its lissome tend to burst and release their contents into the cell. As a result of this, that cell will
A) recycle damaged organelles.
B) undergo self-digestion and die.
C) produce replacement lissome.
D) undergo cell division. Resolution is the A) ability of an optical instrument to magnify an image. B) distance between the lenses of a microscope. C) size of an image. D) ability of an optical instrument to show two close objects as separate. Points A scientist wants to magnify a pollen grain 8,000 times and examine the ridges and pores on its surface. Which one of the following instruments would be best? A) an inverted light microscope B) a transmission electron microscope C) a fluorescence conical microscope D) a scanning electron microscope
Which of the following statements about internal membranes in eukaryotic cells is false?
A) In eukaryotic cells, internal membranes provide an additional area for many metabolic processes to occur.
B) In eukaryotic cells, internal membranes form membranous compartments called organelles.
C) In eukaryotic cells, internal membranes greatly increase a cell’s total membrane area.
D) In eukaryotic cells, internal membranes standardize the internal environment of all cellular organelles.
Which of the following statements about lissome is false?
A) Lissome synthesize routines from the recycled amino acids.
B) Lissome fuse with food vacuoles to expose nutrients to Allyson enzymes.
C) Lissome help to digest worn-out or damaged organelles.
D) Lissome destroy harmful bacteria engulfed by white blood cells. Points Earned: A woman is having trouble becoming pregnant. Examination of her partner’s sperm indicates that dyne feet are missing from the flagella in his sperm cells.
A physician explains that this could interfere with fertility by
A) preventing the sperm from swimming to the egg cell.
B) preventing the sperm from attaching to the egg cell.
C) interfering with the attachment of the flagella to the sperm.
D) preventing the sperm from producing enough energy to power swimming.
You are told that the cells on a microscope slide are plant, animal, or bacterial. You look at them through a microscope and see cell walls and membrane-bound organelles. You conclude correctly that the cells
A) could be either plant or bacterial cells.
B) are bacterial cells.
C) are plant cells.
D) are animal cells.
The membranous compartmentalizing of a cell A) requires the presence of a cell wall.
Biology Quiz Essay
1.| Fermentation – B|
A)| takes place in the mitochondrion.|
B)| takes place in all animal cells.|
C)| does not require O2.|
D)| requires lactic acid.|
E)| prevents glycolysis.|
2.| In the cell, the site of oxygen utilization is the – D| A)| nucleus.|
C)| endoplasmic reticulum.|
3.| Animals inhale air containing oxygen and exhale air with less oxygen and more carbon dioxide. After inhalation, the oxygen missing from the air will mostly be found in – A| A)| the carbon dioxide that is exhaled.|
C)| organic molecules.|
4.| The first phase of photosynthesis, a series of reactions that requires the absorption of photons to form ATP and NADPH, is referred to as the __D_____ phase.| A)| Reduction|
B)| dark reactions|
C)| carbon fixation|
D)| light reactions (or photophosphorylation)|
E)| None of the above|
5.| Plants are green because – A|
A)| chlorophylls absorb blue and orange-red wavelengths of light and
reflect green light.| B)| chloroplasts transmit green light.|
C)| energized chlorophyll a emits green light.|
D)| plants do not possess green pigment.|
E)| chlorophylls absorb green light.|
6.| The main function of photosynthesis is the – C|
A)| consumption of CO2.|
B)| production of ATP.|
C)| conversion of light energy to chemical energy.|
D)| production of starch.|
E)| production of O2.|
7.| Most of the ATP made during the complete oxidation of glucose to CO2 and water is – B| A)| made by the mitochondrial ATP synthase.|
B)| from substrate-level phosphorylation.|
C)| synthesized by the sodium–potassium ATPase.|
D)| synthesized in the cytosol.|
E)| made directly by the citric acid cycle.|
8.| Oxidation and reduction – E|
A)| entail the gain or loss of proteins.|
B)| are defined as the loss of electrons.|
C)| are both endergonic reactions.|
D)| always occur together.|
E)| proceed only under aerobic conditions.|
9.| In human muscle cells, the fermentation process produces -A| A)| lactic acid.|
B)| 12 moles of ATP.|
C)| pyruvic acid.|
D)| an excessive amount of energy.|
E)| None of the above|
10.| The O2 gas produced during photosynthesis is derived from – A| A)| CO2.|
E)| bicarbonate ions.|
11.| Which of the following occurs during the Calvin cycle reactions of photosynthesis? -E| A)| Water is converted into hydrogen and water.|
B)| CO2 is converted into sugars.|
C)| Chlorophyll acts as an enzyme.|
D)| Nothing occurs; the plant rests in the dark.|
E)| None of the above|
12.| The citric acid cycle begins with- C|
C)| acetyl CoA.|
D)| NADH + H+.|
E)| ATP synthase.|
13.| Animals breathe in air containing oxygen and breathe out air with less oxygen and more carbon dioxide. The carbon dioxide comes from -A| A)| hydrocarbons and the air.|
B)| the citric acid cycle.|
D)| waste products.|
E)| All of the above|
14.| In C4 plants, CO2 is first fixed into a compound called C| A)| pyruvate.|
D)| ribulose bisphosphate.|
15.| Compared with fermentation, the aerobic pathways of glucose metabolism
produce A| A)| more ATP.|
C)| fewer protons for pumping in the mitochondria.|
D)| less CO2.|
E)| more oxidized coenzymes.|
16.| Cyanide inhibits the enzyme in the mitochondrial electron transport chain that reduces O2 to water. Suppose that you add cyanide to a suspension of muscle cells from a rat. Which statement given below is the most accurate with respect to the effects of cyanide on glucose catabolism? D| A)| The citric acid cycle and glycolysis would be inhibited.| B)| The citric acid cycle would be inhibited, but glycolysis would not. Ethanol accumulates.| C)| The citric acid cycle and glycolysis would be stimulated.| D)| The citric acid cycle would be inhibited, but glycolysis would not. Lactic acid accumulates.| E)| The citric acid cycle would not be inhibited, but glycolysis would.|
17.| In cacti, an example of CAM plants, CO2 is stored for use in the Calvin cycle – B| A)| in the stems, roots, and leaves.|
B)| during the evening.|
C)| in glucose molecules.|
D)| in the stroma.|
E)| Both a and d|
18.| Photosynthesis in green plants occurs only during the day. Respiration in plants occurs – D | A)| only at night.|
B)| only when there is enough ATP.|
C)| only during the day.|
D)| all the time.|
E)| in the chloroplast after photosynthesis.|
19.| The end result of glycolysis is the – C|
A)| creation of 38 molecules of ATP.|
B)| reduction of 8 molecules of NAD.|
C)| formation of 2 molecules of pyruvate.|
D)| conversion of 1 molecule of glucose to lactic acid.|
E)| None of the above|
20.| The citric acid cycle – B|
A)| has no connection with the respiratory chain.|
B)| is the same thing as fermentation.|
C)| reduces two NAD+ for every glucose processed.|
D)| produces no ATP.|
E)| takes place in the mitochondrion.|