Q. Which process converts glucose into ATP in the presence of oxygen?
-
A.
Fermentation
-
B.
Glycolysis
-
C.
Aerobic respiration
-
D.
Anaerobic respiration
Solution
Aerobic respiration is the process that converts glucose into ATP using oxygen.
Correct Answer:
C
— Aerobic respiration
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Q. Which process converts glucose into pyruvate?
-
A.
Glycolysis
-
B.
Krebs cycle
-
C.
Oxidative phosphorylation
-
D.
Fermentation
Solution
Glycolysis is the metabolic pathway that converts glucose into pyruvate, producing ATP and NADH in the process.
Correct Answer:
A
— Glycolysis
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Q. Which process directly produces ATP during fatty acid oxidation?
-
A.
Beta-oxidation
-
B.
Glycolysis
-
C.
Citric Acid Cycle
-
D.
Electron Transport Chain
Solution
Beta-oxidation is the process that breaks down fatty acids to produce acetyl-CoA, which enters the citric acid cycle for ATP production.
Correct Answer:
A
— Beta-oxidation
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Q. Which process do microbes use to produce vinegar?
-
A.
Anaerobic respiration
-
B.
Aerobic respiration
-
C.
Fermentation
-
D.
Photosynthesis
Solution
Aerobic respiration is used by acetic acid bacteria to convert ethanol into acetic acid, producing vinegar.
Correct Answer:
B
— Aerobic respiration
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Q. Which process ensures the accuracy of DNA replication?
-
A.
Transcription
-
B.
Proofreading
-
C.
Translation
-
D.
Splicing
Solution
Proofreading by DNA polymerase ensures the accuracy of DNA replication by correcting errors.
Correct Answer:
B
— Proofreading
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Q. Which process involves the conversion of DNA to RNA?
-
A.
Transcription
-
B.
Translation
-
C.
Replication
-
D.
Translocation
Solution
Transcription is the process by which the information in a DNA sequence is copied into a complementary RNA sequence.
Correct Answer:
A
— Transcription
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Q. Which process involves the decoding of mRNA to synthesize proteins?
-
A.
Transcription
-
B.
Translation
-
C.
Replication
-
D.
Splicing
Solution
Translation is the process where ribosomes decode mRNA to synthesize proteins.
Correct Answer:
B
— Translation
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Q. Which process involves the removal of an amino group from an amino acid?
-
A.
Transamination
-
B.
Deamination
-
C.
Decarboxylation
-
D.
Condensation
Solution
Deamination is the process of removing an amino group from an amino acid, resulting in the formation of ammonia.
Correct Answer:
B
— Deamination
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Q. Which process involves the transfer of genetic material between bacteria through direct contact?
-
A.
Transformation
-
B.
Transduction
-
C.
Conjugation
-
D.
Replication
Solution
Conjugation is the process where genetic material is transferred between bacteria through direct contact, typically via a pilus.
Correct Answer:
C
— Conjugation
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Q. Which process involves the uptake of naked DNA by a bacterial cell?
-
A.
Transduction
-
B.
Conjugation
-
C.
Transformation
-
D.
Binary fission
Solution
Transformation is the process where bacteria take up naked DNA from their environment.
Correct Answer:
C
— Transformation
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Q. Which process is commonly used to remove suspended solids from water?
-
A.
Filtration
-
B.
Chlorination
-
C.
Fluoridation
-
D.
Sedimentation
Solution
Filtration is the process used to remove suspended solids from water.
Correct Answer:
A
— Filtration
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Q. Which process is essential for creating synthetic seeds?
-
A.
Photosynthesis
-
B.
Micropropagation
-
C.
Grafting
-
D.
Hybridization
Solution
Micropropagation is essential for creating synthetic seeds, as it involves growing plant tissues in a controlled environment.
Correct Answer:
B
— Micropropagation
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Q. Which process is primarily carried out by soil microorganisms?
-
A.
Photosynthesis
-
B.
Nitrification
-
C.
Transpiration
-
D.
Evaporation
Solution
Nitrification is a key process carried out by soil microorganisms, converting ammonia to nitrates.
Correct Answer:
B
— Nitrification
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Q. Which process is primarily used to remove suspended solids from wastewater?
-
A.
Sedimentation
-
B.
Filtration
-
C.
Chlorination
-
D.
Aeration
Solution
Sedimentation is primarily used to remove suspended solids from wastewater by allowing them to settle at the bottom of a tank.
Correct Answer:
A
— Sedimentation
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Q. Which process occurs first during the initiation of translation?
-
A.
Binding of the ribosome to mRNA
-
B.
tRNA binding to the start codon
-
C.
Formation of the peptide bond
-
D.
Release of the completed polypeptide
Solution
The binding of the ribosome to mRNA occurs first during the initiation of translation.
Correct Answer:
A
— Binding of the ribosome to mRNA
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Q. Which process occurs in the absence of oxygen and produces lactic acid?
-
A.
Aerobic respiration
-
B.
Glycolysis
-
C.
Lactic acid fermentation
-
D.
Krebs cycle
Solution
Lactic acid fermentation occurs in the absence of oxygen and produces lactic acid.
Correct Answer:
C
— Lactic acid fermentation
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Q. Which process occurs in the chloroplasts of plant cells?
-
A.
Cellular respiration
-
B.
Photosynthesis
-
C.
Nitrogen fixation
-
D.
Fermentation
Solution
Photosynthesis occurs in the chloroplasts, where light energy is converted into chemical energy.
Correct Answer:
B
— Photosynthesis
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Q. Which process occurs in the mitochondria?
-
A.
Photosynthesis
-
B.
Glycolysis
-
C.
Krebs Cycle
-
D.
Fermentation
Solution
The Krebs Cycle occurs in the mitochondria as part of cellular respiration.
Correct Answer:
C
— Krebs Cycle
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Q. Which process primarily drives the movement of water in plants?
-
A.
Diffusion
-
B.
Osmosis
-
C.
Active transport
-
D.
Transpiration
Solution
Transpiration creates a negative pressure in the leaves, which helps pull water upward through the xylem.
Correct Answer:
D
— Transpiration
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Q. Which process results in the formation of gametes with half the number of chromosomes?
-
A.
Mitosis
-
B.
Meiosis
-
C.
Fertilization
-
D.
Binary fission
Solution
Meiosis is the process that reduces the chromosome number by half, producing gametes for sexual reproduction.
Correct Answer:
B
— Meiosis
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Q. Which property of peptides is influenced by the side chains of amino acids?
-
A.
Primary structure
-
B.
Secondary structure
-
C.
Tertiary structure
-
D.
Quaternary structure
Solution
The side chains (R groups) of amino acids influence the folding and interactions that determine the tertiary structure of peptides.
Correct Answer:
C
— Tertiary structure
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Q. Which protein binds to the operator region of the lac operon?
-
A.
RNA polymerase
-
B.
Lac repressor
-
C.
cAMP receptor protein
-
D.
Beta-galactosidase
Solution
The lac repressor binds to the operator region of the lac operon, preventing transcription of downstream genes when lactose is absent.
Correct Answer:
B
— Lac repressor
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Q. Which protein is primarily involved in the unwinding of DNA during replication?
-
A.
DNA polymerase
-
B.
Helicase
-
C.
Ligase
-
D.
Topoisomerase
Solution
Helicase is the enzyme responsible for unwinding the DNA double helix during replication, allowing access for other proteins.
Correct Answer:
B
— Helicase
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Q. Which protozoan is commonly associated with sleeping sickness?
-
A.
Giardia lamblia
-
B.
Plasmodium vivax
-
C.
Trypanosoma brucei
-
D.
Leishmania donovani
Solution
Trypanosoma brucei is the causative agent of sleeping sickness, transmitted by tsetse flies.
Correct Answer:
C
— Trypanosoma brucei
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Q. Which protozoan is known to cause severe dehydration in children due to diarrhea?
-
A.
Cryptosporidium parvum
-
B.
Entamoeba histolytica
-
C.
Giardia lamblia
-
D.
Balantidium coli
Solution
Cryptosporidium parvum can cause severe diarrhea leading to dehydration, especially in children.
Correct Answer:
A
— Cryptosporidium parvum
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Q. Which reflex is an example of a monosynaptic reflex?
-
A.
Withdrawal reflex
-
B.
Knee-jerk reflex
-
C.
Pupillary reflex
-
D.
Crossed extensor reflex
Solution
The knee-jerk reflex is an example of a monosynaptic reflex, involving only one synapse between the sensory and motor neurons.
Correct Answer:
B
— Knee-jerk reflex
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Q. Which reflex is responsible for maintaining posture?
-
A.
Stretch reflex
-
B.
Withdrawal reflex
-
C.
Crossed extensor reflex
-
D.
Pupillary reflex
Solution
The stretch reflex is responsible for maintaining posture by adjusting muscle tension in response to changes in muscle length.
Correct Answer:
A
— Stretch reflex
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Q. Which regulatory body oversees the use of transgenic animals in research in the United States?
-
A.
FDA
-
B.
USDA
-
C.
EPA
-
D.
NIH
Solution
The USDA (United States Department of Agriculture) oversees the use of transgenic animals in research, along with other regulatory bodies.
Correct Answer:
B
— USDA
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Q. Which RNA molecule carries the genetic information from DNA to the ribosome?
-
A.
tRNA
-
B.
rRNA
-
C.
mRNA
-
D.
snRNA
Solution
mRNA (messenger RNA) carries the genetic information from DNA to the ribosome for protein synthesis.
Correct Answer:
C
— mRNA
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Q. Which seafood is considered a good source of protein and low in calories?
-
A.
Shrimp
-
B.
Crab
-
C.
Lobster
-
D.
All of the above
Solution
All of these seafood options are high in protein and low in calories, making them healthy choices.
Correct Answer:
D
— All of the above
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