Q. What is the role of the hypothalamus in the endocrine system?
-
A.
To produce insulin
-
B.
To regulate body temperature and hunger
-
C.
To filter blood
-
D.
To store bile
Solution
The hypothalamus plays a crucial role in regulating body temperature, hunger, and various hormonal functions.
Correct Answer:
B
— To regulate body temperature and hunger
Learn More →
Q. What is the role of the juxtaglomerular apparatus in renal physiology?
-
A.
Regulating blood flow to the glomerulus
-
B.
Secreting erythropoietin
-
C.
Monitoring sodium concentration
-
D.
Producing urine
Solution
The juxtaglomerular apparatus regulates blood flow to the glomerulus and plays a key role in blood pressure regulation.
Correct Answer:
A
— Regulating blood flow to the glomerulus
Learn More →
Q. What is the role of the kidneys in homeostasis?
-
A.
Regulating blood pressure
-
B.
Filtering blood and producing urine
-
C.
Producing red blood cells
-
D.
All of the above
Solution
The kidneys play a crucial role in homeostasis by filtering blood, producing urine, and regulating blood pressure and electrolyte balance.
Correct Answer:
D
— All of the above
Learn More →
Q. What is the role of the kidneys in pharmacokinetics?
-
A.
Absorption of drugs
-
B.
Distribution of drugs
-
C.
Metabolism of drugs
-
D.
Excretion of drugs
Solution
The kidneys are primarily involved in the excretion of drugs and their metabolites from the body.
Correct Answer:
D
— Excretion of drugs
Learn More →
Q. What is the role of the liver in metabolic homeostasis?
-
A.
Producing bile
-
B.
Storing glucose as glycogen
-
C.
Detoxifying substances
-
D.
All of the above
Solution
The liver is involved in multiple metabolic processes, including bile production, glucose storage, and detoxification.
Correct Answer:
D
— All of the above
Learn More →
Q. What is the role of the magnetic field in NMR spectroscopy?
-
A.
To ionize the sample
-
B.
To separate molecules
-
C.
To align nuclear spins
-
D.
To heat the sample
Solution
The magnetic field aligns the nuclear spins of the sample, which is essential for obtaining NMR signals.
Correct Answer:
C
— To align nuclear spins
Learn More →
Q. What is the role of the notochord during embryonic development?
-
A.
Support structure
-
B.
Nerve development
-
C.
Muscle formation
-
D.
Blood vessel formation
Solution
The notochord serves as a support structure and plays a crucial role in the development of the vertebral column.
Correct Answer:
A
— Support structure
Learn More →
Q. What is the role of the pericardium?
-
A.
To provide electrical insulation
-
B.
To protect the heart and anchor it within the thorax
-
C.
To facilitate blood flow
-
D.
To produce heart sounds
Solution
The pericardium is a double-walled sac that protects the heart and anchors it within the thorax.
Correct Answer:
B
— To protect the heart and anchor it within the thorax
Learn More →
Q. What is the role of the promoter in transcription?
-
A.
To terminate transcription
-
B.
To enhance RNA stability
-
C.
To initiate transcription
-
D.
To splice RNA
Solution
The promoter is a DNA sequence that signals the start of transcription and is recognized by RNA polymerase.
Correct Answer:
C
— To initiate transcription
Learn More →
Q. What is the role of the promoter in transgenic animal technology?
-
A.
To enhance animal growth
-
B.
To control gene expression
-
C.
To provide nutrients
-
D.
To increase reproduction rates
Solution
The promoter is a DNA sequence that controls the expression of a gene, determining when and where the gene is active.
Correct Answer:
B
— To control gene expression
Learn More →
Q. What is the role of the side chain (R group) in amino acids?
-
A.
Determines the amino acid's charge
-
B.
Determines the amino acid's polarity
-
C.
Determines the amino acid's reactivity
-
D.
All of the above
Solution
The side chain (R group) of an amino acid determines its charge, polarity, and reactivity, influencing its role in proteins.
Correct Answer:
D
— All of the above
Learn More →
Q. What is the role of the sodium-potassium pump in neurons?
-
A.
To maintain resting membrane potential
-
B.
To generate action potentials
-
C.
To release neurotransmitters
-
D.
To facilitate synaptic transmission
Solution
The sodium-potassium pump actively transports sodium out of the cell and potassium into the cell, helping to maintain the resting membrane potential.
Correct Answer:
A
— To maintain resting membrane potential
Learn More →
Q. What is the role of the spinal cord in reflex actions?
-
A.
To process complex thoughts
-
B.
To serve as a relay center for reflexes
-
C.
To store memories
-
D.
To regulate blood pressure
Solution
The spinal cord serves as a relay center for reflexes, allowing for quick responses to stimuli without involving the brain.
Correct Answer:
B
— To serve as a relay center for reflexes
Learn More →
Q. What is the role of the stationary phase in HPLC?
-
A.
To provide a mobile phase
-
B.
To separate analytes based on their interactions
-
C.
To inject the sample
-
D.
To detect the analytes
Solution
The stationary phase in HPLC separates analytes based on their interactions with the stationary material.
Correct Answer:
B
— To separate analytes based on their interactions
Learn More →
Q. What is the role of the TATA box in transcription?
-
A.
It is a coding region
-
B.
It is a binding site for RNA polymerase
-
C.
It is a site for RNA splicing
-
D.
It is a termination signal
Solution
The TATA box is a DNA sequence that serves as a binding site for RNA polymerase and is crucial for the initiation of transcription.
Correct Answer:
B
— It is a binding site for RNA polymerase
Learn More →
Q. What is the role of the transducer in a biosensor?
-
A.
To provide a biological response
-
B.
To convert a biological signal into a measurable signal
-
C.
To store data
-
D.
To amplify the signal
Solution
The transducer in a biosensor converts the biological signal generated by the interaction of the analyte and the bioreceptor into a measurable signal.
Correct Answer:
B
— To convert a biological signal into a measurable signal
Learn More →
Q. What is the role of the viral envelope?
-
A.
To provide structural support
-
B.
To facilitate entry into host cells
-
C.
To store viral genetic material
-
D.
To replicate viral RNA
Solution
The viral envelope plays a crucial role in facilitating the entry of the virus into host cells by fusing with the host cell membrane.
Correct Answer:
B
— To facilitate entry into host cells
Learn More →
Q. What is the role of the virulence genes in Agrobacterium?
-
A.
To promote plant growth
-
B.
To facilitate T-DNA transfer
-
C.
To enhance photosynthesis
-
D.
To provide disease resistance
Solution
Virulence genes in Agrobacterium are responsible for facilitating the transfer of T-DNA into the plant cell.
Correct Answer:
B
— To facilitate T-DNA transfer
Learn More →
Q. What is the role of transposable elements in plant genomes?
-
A.
To stabilize the genome
-
B.
To facilitate gene expression
-
C.
To promote genetic diversity
-
D.
To repair DNA
Solution
Transposable elements can move within the genome, contributing to genetic diversity.
Correct Answer:
C
— To promote genetic diversity
Learn More →
Q. What is the role of UV luminance spectroscopy in cancer research?
-
A.
Identifying genetic mutations
-
B.
Monitoring treatment efficacy
-
C.
Detecting early-stage tumors
-
D.
Analyzing tumor microenvironments
Solution
UV luminance spectroscopy plays a role in detecting early-stage tumors by analyzing changes in tissue properties due to UV exposure.
Correct Answer:
D
— Analyzing tumor microenvironments
Learn More →
Q. What is the role of vaccines in viral infections?
-
A.
Cure existing infections
-
B.
Prevent infections
-
C.
Treat symptoms
-
D.
None of the above
Solution
Vaccines are designed to prevent viral infections by stimulating the immune response.
Correct Answer:
B
— Prevent infections
Learn More →
Q. What is the role of viruses in aquatic ecosystems?
-
A.
Promoting algal blooms
-
B.
Regulating bacterial populations
-
C.
Decomposing organic matter
-
D.
Producing oxygen
Solution
Viruses play a crucial role in regulating bacterial populations in aquatic ecosystems, influencing nutrient cycling and community dynamics.
Correct Answer:
B
— Regulating bacterial populations
Learn More →
Q. What is the role of viruses in the ecosystem?
-
A.
Decompose organic matter
-
B.
Regulate bacterial populations
-
C.
Photosynthesize
-
D.
Produce oxygen
Solution
Viruses play a role in regulating bacterial populations, which can influence nutrient cycling in ecosystems.
Correct Answer:
B
— Regulate bacterial populations
Learn More →
Q. What is the role of Vitamin K in the body?
-
A.
Bone mineralization
-
B.
Antioxidant defense
-
C.
Blood clotting
-
D.
Energy production
Solution
Vitamin K is essential for blood clotting as it is required for the synthesis of clotting factors in the liver.
Correct Answer:
C
— Blood clotting
Learn More →
Q. What is the role of yeast in the ethanol production process?
-
A.
To produce carbon dioxide
-
B.
To convert sugars into ethanol
-
C.
To filter impurities
-
D.
To enhance flavor
Solution
Yeast plays a crucial role in converting sugars into ethanol during the fermentation process.
Correct Answer:
B
— To convert sugars into ethanol
Learn More →
Q. What is the shape of mycoplasma bacteria?
-
A.
Spherical
-
B.
Rod-shaped
-
C.
Irregular
-
D.
Spiral
Solution
Mycoplasma bacteria have an irregular shape.
Correct Answer:
C
— Irregular
Learn More →
Q. What is the significance of a promoter in a vector?
-
A.
It provides structural support to the vector
-
B.
It regulates the expression of the inserted gene
-
C.
It enhances cell division
-
D.
It prevents vector degradation
Solution
A promoter is crucial as it regulates the expression of the inserted gene, determining when and how much of the gene product is made.
Correct Answer:
B
— It regulates the expression of the inserted gene
Learn More →
Q. What is the significance of callus formation in plant cell culture?
-
A.
It indicates contamination
-
B.
It is a step towards organogenesis
-
C.
It prevents cell division
-
D.
It enhances photosynthetic activity
Solution
Callus formation is significant as it is a step towards organogenesis, where the callus can differentiate into roots or shoots.
Correct Answer:
B
— It is a step towards organogenesis
Learn More →
Q. What is the significance of chromosome mapping in animal biotechnology?
-
A.
Identifying genetic disorders
-
B.
Improving animal nutrition
-
C.
Enhancing growth rates
-
D.
Increasing disease resistance
Solution
Chromosome mapping helps identify the location of genes associated with genetic disorders, aiding in breeding and treatment strategies.
Correct Answer:
A
— Identifying genetic disorders
Learn More →
Q. What is the significance of metabolic engineering in biochemical engineering?
-
A.
To enhance the efficiency of metabolic pathways
-
B.
To create new microbial strains
-
C.
To improve product yield
-
D.
All of the above
Solution
Metabolic engineering is significant for enhancing the efficiency of metabolic pathways, creating new microbial strains, and improving product yield.
Correct Answer:
D
— All of the above
Learn More →
Showing 751 to 780 of 1754 (59 Pages)