Q. Which type of gene transfer is most commonly associated with antibiotic resistance?
A.
Transformation
B.
Transduction
C.
Conjugation
D.
All of the above
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Solution
All of the above methods can contribute to the spread of antibiotic resistance among bacteria.
Correct Answer:
D
— All of the above
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Q. Which type of glial cell is responsible for myelination in the central nervous system?
A.
Astrocytes
B.
Oligodendrocytes
C.
Microglia
D.
Schwann cells
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Solution
Oligodendrocytes are the glial cells that produce myelin in the central nervous system, insulating axons and enhancing signal transmission.
Correct Answer:
B
— Oligodendrocytes
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Q. Which type of hypersensitivity reaction is mediated by IgE antibodies?
A.
Type I
B.
Type II
C.
Type III
D.
Type IV
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Solution
Type I hypersensitivity reactions are mediated by IgE antibodies and are associated with allergic responses.
Correct Answer:
A
— Type I
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Q. Which type of immune response involves the production of antibodies?
A.
Cell-mediated immunity
B.
Humoral immunity
C.
Innate immunity
D.
Passive immunity
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Solution
Humoral immunity is the type of immune response that involves the production of antibodies by B cells.
Correct Answer:
B
— Humoral immunity
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Q. Which type of immune response is characterized by the production of memory cells?
A.
Innate immune response
B.
Primary immune response
C.
Secondary immune response
D.
Non-specific immune response
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Solution
The secondary immune response is characterized by the rapid production of memory cells that respond to previously encountered antigens.
Correct Answer:
C
— Secondary immune response
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Q. Which type of immune response is characterized by the rapid response to a previously encountered pathogen?
A.
Primary response
B.
Secondary response
C.
Innate response
D.
Adaptive response
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Solution
The secondary immune response is faster and more robust due to the presence of memory cells from the primary response.
Correct Answer:
B
— Secondary response
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Q. Which type of immunity is provided by vaccinations?
A.
Innate immunity
B.
Passive immunity
C.
Active immunity
D.
Cell-mediated immunity
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Solution
Vaccinations provide active immunity by stimulating the immune system to produce antibodies.
Correct Answer:
C
— Active immunity
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Q. Which type of inhibition can be overcome by increasing substrate concentration?
A.
Non-competitive inhibition
B.
Competitive inhibition
C.
Uncompetitive inhibition
D.
Allosteric inhibition
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Solution
Competitive inhibition can be overcome by increasing substrate concentration, as it competes with the substrate for the active site.
Correct Answer:
B
— Competitive inhibition
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Q. Which type of joint allows for the greatest range of motion?
A.
Hinge joint
B.
Ball-and-socket joint
C.
Pivot joint
D.
Saddle joint
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Solution
Ball-and-socket joints, such as the shoulder and hip joints, allow for the greatest range of motion.
Correct Answer:
B
— Ball-and-socket joint
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Q. Which type of lipid is most commonly found in cell membranes?
A.
Triglycerides
B.
Phospholipids
C.
Sterols
D.
Fatty acids
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Solution
Phospholipids are the main component of cell membranes, providing structure and fluidity.
Correct Answer:
B
— Phospholipids
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Q. Which type of meat is considered red meat?
A.
Chicken
B.
Pork
C.
Turkey
D.
Fish
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Solution
Pork is considered red meat, while chicken and turkey are classified as white meat.
Correct Answer:
B
— Pork
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Q. Which type of microbe is most commonly found in freshwater ecosystems?
A.
Bacteria
B.
Viruses
C.
Fungi
D.
Protozoa
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Solution
Bacteria are the most abundant and diverse microbes found in freshwater ecosystems, playing essential roles in nutrient cycling.
Correct Answer:
A
— Bacteria
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Q. Which type of microorganism is commonly used in the production of antibiotics?
A.
Bacteria
B.
Viruses
C.
Fungi
D.
Algae
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Solution
Fungi, particularly species like Penicillium, are commonly used in the production of antibiotics.
Correct Answer:
C
— Fungi
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Q. Which type of milk is lactose-free?
A.
Skim milk
B.
Whole milk
C.
Lactose-free milk
D.
Buttermilk
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Solution
Lactose-free milk is treated to remove or break down lactose, making it suitable for lactose-intolerant individuals.
Correct Answer:
C
— Lactose-free milk
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Q. Which type of molecules can easily pass through the lipid bilayer of the cell membrane?
A.
Ions
B.
Large polar molecules
C.
Small nonpolar molecules
D.
Glucose
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Solution
Small nonpolar molecules can easily diffuse through the lipid bilayer due to their compatibility with the hydrophobic core.
Correct Answer:
C
— Small nonpolar molecules
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Q. Which type of muscle tissue is involuntary and found in the walls of hollow organs?
A.
Skeletal muscle
B.
Cardiac muscle
C.
Smooth muscle
D.
Striated muscle
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Solution
Smooth muscle is involuntary and is found in the walls of hollow organs such as the intestines and blood vessels.
Correct Answer:
C
— Smooth muscle
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Q. Which type of mutation can result from exposure to ionizing radiation?
A.
Point mutation
B.
Translocation
C.
Inversion
D.
All of the above
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Solution
Ionizing radiation can cause various types of mutations, including point mutations, translocations, and inversions.
Correct Answer:
D
— All of the above
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Q. Which type of necrosis is typically seen in myocardial infarction?
A.
Caseous necrosis
B.
Liquefactive necrosis
C.
Coagulative necrosis
D.
Fat necrosis
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Solution
Coagulative necrosis is the type of necrosis commonly seen in myocardial infarction due to ischemia.
Correct Answer:
C
— Coagulative necrosis
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Q. Which type of nuclei is most commonly analyzed using NMR spectroscopy?
A.
Carbon-12
B.
Hydrogen-1
C.
Oxygen-16
D.
Nitrogen-14
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Solution
Hydrogen-1 (proton NMR) is the most commonly analyzed nucleus in NMR spectroscopy due to its abundance in organic compounds.
Correct Answer:
B
— Hydrogen-1
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Q. Which type of nucleic acid is primarily involved in protein synthesis?
A.
DNA
B.
mRNA
C.
tRNA
D.
rRNA
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Solution
mRNA (messenger RNA) carries the genetic information from DNA to the ribosome, where proteins are synthesized.
Correct Answer:
B
— mRNA
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Q. Which type of PCR is used to amplify RNA?
A.
Real-time PCR
B.
Reverse transcription PCR
C.
Multiplex PCR
D.
Nested PCR
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Solution
Reverse transcription PCR (RT-PCR) is used to amplify RNA by first converting it to complementary DNA (cDNA).
Correct Answer:
B
— Reverse transcription PCR
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Q. Which type of reflex involves the contraction of muscles on the opposite side of the body?
A.
Monosynaptic reflex
B.
Polysynaptic reflex
C.
Reciprocal reflex
D.
Crossed extensor reflex
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Solution
The crossed extensor reflex involves the contraction of muscles on the opposite side of the body in response to a stimulus, providing balance and support.
Correct Answer:
D
— Crossed extensor reflex
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Q. Which type of RNA is involved in the splicing of pre-mRNA?
A.
mRNA
B.
tRNA
C.
rRNA
D.
snRNA
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Solution
snRNA (small nuclear RNA) is involved in the splicing of pre-mRNA.
Correct Answer:
D
— snRNA
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Q. Which type of RNA is primarily involved in carrying the genetic code from DNA to the ribosome?
A.
rRNA
B.
tRNA
C.
mRNA
D.
snRNA
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Solution
mRNA (messenger RNA) carries the genetic code from DNA to the ribosome for protein synthesis.
Correct Answer:
C
— mRNA
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Q. Which type of RNA is primarily involved in the regulation of gene expression at the translation level?
A.
mRNA
B.
tRNA
C.
rRNA
D.
miRNA
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Solution
miRNA (microRNA) is primarily involved in the regulation of gene expression at the translation level.
Correct Answer:
D
— miRNA
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Q. Which type of RNA is responsible for carrying genetic information from DNA to the ribosome?
A.
Transfer RNA (tRNA)
B.
Ribosomal RNA (rRNA)
C.
Messenger RNA (mRNA)
D.
Small nuclear RNA (snRNA)
Show solution
Solution
Messenger RNA (mRNA) carries genetic information from DNA to the ribosome for protein synthesis.
Correct Answer:
C
— Messenger RNA (mRNA)
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Q. Which type of sample can be analyzed using FTIR spectroscopy?
A.
Only solids
B.
Only liquids
C.
Only gases
D.
Solids, liquids, and gases
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Solution
FTIR spectroscopy can analyze solids, liquids, and gases, making it a versatile tool in various fields, including medicine.
Correct Answer:
D
— Solids, liquids, and gases
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Q. Which type of special protein is often used to improve drought resistance in crops?
A.
Antifreeze proteins
B.
Heat shock proteins
C.
Dehydrin proteins
D.
Chaperone proteins
Show solution
Solution
Dehydrin proteins help plants survive under drought conditions by protecting cellular structures.
Correct Answer:
C
— Dehydrin proteins
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Q. Which type of spectroscopy is commonly used to determine the concentration of a substance in solution?
A.
Nuclear Magnetic Resonance (NMR)
B.
Mass Spectrometry (MS)
C.
Ultraviolet-Visible (UV-Vis)
D.
Fluorescence Spectroscopy
Show solution
Solution
Ultraviolet-Visible (UV-Vis) spectroscopy is widely used to determine the concentration of substances in solution based on their absorbance.
Correct Answer:
C
— Ultraviolet-Visible (UV-Vis)
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Q. Which type of spectroscopy is particularly useful for studying protein structures?
A.
Infrared Spectroscopy
B.
Raman Spectroscopy
C.
Nuclear Magnetic Resonance (NMR)
D.
Ultraviolet-Visible (UV-Vis)
Show solution
Solution
Nuclear Magnetic Resonance (NMR) spectroscopy is particularly useful for studying the structures of proteins in solution.
Correct Answer:
C
— Nuclear Magnetic Resonance (NMR)
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