Q. Which of the following is NOT a typical component of plant tissue culture media?
-
A.
Mineral salts
-
B.
Vitamins
-
C.
Antibiotics
-
D.
Proteins
Solution
Proteins are not typically included in plant tissue culture media, while mineral salts, vitamins, and sometimes antibiotics are used.
Correct Answer:
D
— Proteins
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Q. Which of the following is NOT a use of vinegar in cooking?
-
A.
Marinades
-
B.
Pickling
-
C.
Baking soda neutralization
-
D.
Thickening agent
Solution
Vinegar is not used as a thickening agent in cooking; it is more commonly used in marinades and pickling.
Correct Answer:
D
— Thickening agent
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Q. Which of the following is required to initiate DNA replication?
-
A.
RNA primer
-
B.
DNA ligase
-
C.
DNA helicase
-
D.
DNA polymerase
Solution
An RNA primer is required to provide a starting point for DNA polymerase to begin synthesis.
Correct Answer:
A
— RNA primer
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Q. Which of the following items can be sterilized using dry heat?
-
A.
Plastic syringes
-
B.
Glassware
-
C.
Rubber gloves
-
D.
Surgical drapes
Solution
Glassware can be sterilized using dry heat, as it can withstand high temperatures without damage.
Correct Answer:
B
— Glassware
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Q. Which of the following macromolecules can act as enzymes?
-
A.
Carbohydrates
-
B.
Lipids
-
C.
Proteins
-
D.
Nucleic acids
Solution
Proteins can act as enzymes, catalyzing biochemical reactions.
Correct Answer:
C
— Proteins
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Q. Which of the following modifications can occur to mRNA before it is translated?
-
A.
5' capping
-
B.
3' polyadenylation
-
C.
RNA splicing
-
D.
All of the above
Solution
All of the above modifications (5' capping, 3' polyadenylation, and RNA splicing) occur to mRNA before it is translated.
Correct Answer:
D
— All of the above
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Q. Which of the following muscles is innervated by the median nerve?
-
A.
Flexor carpi ulnaris
-
B.
Flexor digitorum profundus
-
C.
Flexor carpi radialis
-
D.
Brachioradialis
Solution
The flexor carpi radialis is innervated by the median nerve.
Correct Answer:
C
— Flexor carpi radialis
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Q. Which of the following mutations can lead to a change in the amino acid sequence?
-
A.
Silent mutation
-
B.
Missense mutation
-
C.
Nonsense mutation
-
D.
All of the above
Solution
A missense mutation results in a different amino acid being incorporated into the protein, potentially altering its function.
Correct Answer:
B
— Missense mutation
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Q. Which of the following nucleotides is NOT found in RNA?
-
A.
Adenine
-
B.
Cytosine
-
C.
Thymine
-
D.
Uracil
Solution
Thymine is found in DNA, while RNA contains uracil instead.
Correct Answer:
C
— Thymine
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Q. Which of the following organs is located in the retroperitoneal space?
-
A.
Liver
-
B.
Pancreas
-
C.
Stomach
-
D.
Spleen
Solution
The pancreas is located in the retroperitoneal space, behind the peritoneum.
Correct Answer:
B
— Pancreas
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Q. Which of the following practices can help reduce water pollution?
-
A.
Using pesticides excessively
-
B.
Properly disposing of hazardous waste
-
C.
Dumping chemicals in rivers
-
D.
Overusing fertilizers
Solution
Proper disposal of hazardous waste is crucial in preventing water pollution.
Correct Answer:
B
— Properly disposing of hazardous waste
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Q. Which of the following processes occurs after transcription in eukaryotic cells?
-
A.
Translation
-
B.
Replication
-
C.
RNA splicing
-
D.
DNA repair
Solution
RNA splicing is a process that occurs after transcription in eukaryotic cells, where introns are removed and exons are joined.
Correct Answer:
C
— RNA splicing
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Q. Which of the following protozoa is known to cause malaria?
-
A.
Entamoeba histolytica
-
B.
Plasmodium falciparum
-
C.
Trypanosoma brucei
-
D.
Toxoplasma gondii
Solution
Plasmodium falciparum is the protozoan responsible for the most severe form of malaria.
Correct Answer:
B
— Plasmodium falciparum
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Q. Which of the following routes of administration typically results in the highest bioavailability?
-
A.
Intravenous
-
B.
Oral
-
C.
Intramuscular
-
D.
Subcutaneous
Solution
Intravenous administration results in the highest bioavailability since the drug is delivered directly into the systemic circulation.
Correct Answer:
A
— Intravenous
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Q. Which of the following statements about DNA replication is true?
-
A.
It is a conservative process
-
B.
It is a semi-conservative process
-
C.
It is a dispersive process
-
D.
It occurs only in prokaryotes
Solution
DNA replication is a semi-conservative process, meaning each new DNA molecule consists of one old strand and one new strand.
Correct Answer:
B
— It is a semi-conservative process
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Q. Which of the following statements about enzyme inhibitors is true?
-
A.
They always permanently inactivate enzymes.
-
B.
They can be reversible or irreversible.
-
C.
They only affect allosteric enzymes.
-
D.
They increase the rate of reaction.
Solution
Enzyme inhibitors can be either reversible or irreversible, affecting enzyme activity in different ways.
Correct Answer:
B
— They can be reversible or irreversible.
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Q. Which of the following statements about enzymes is true?
-
A.
Enzymes can work on any substrate
-
B.
Enzymes are specific to their substrates
-
C.
Enzymes do not require cofactors
-
D.
Enzymes are only found in humans
Solution
Enzymes are specific to their substrates, meaning each enzyme typically catalyzes only one type of reaction.
Correct Answer:
B
— Enzymes are specific to their substrates
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Q. Which of the following statements about oxidative phosphorylation is true?
-
A.
It occurs in the cytoplasm
-
B.
It requires oxygen
-
C.
It produces lactic acid
-
D.
It is independent of the electron transport chain
Solution
Oxidative phosphorylation requires oxygen as the final electron acceptor in the electron transport chain.
Correct Answer:
B
— It requires oxygen
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Q. Which of the following structures is NOT part of the gastrointestinal tract?
-
A.
Esophagus
-
B.
Stomach
-
C.
Pancreas
-
D.
Large intestine
Solution
The pancreas is an accessory organ and is not part of the gastrointestinal tract.
Correct Answer:
C
— Pancreas
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Q. Which of the following structures is NOT part of the pelvic cavity?
-
A.
Bladder
-
B.
Rectum
-
C.
Uterus
-
D.
Stomach
Solution
The stomach is located in the abdominal cavity, not the pelvic cavity.
Correct Answer:
D
— Stomach
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Q. Which of the following techniques is commonly used to analyze chromosomes?
-
A.
PCR
-
B.
Karyotyping
-
C.
Gel electrophoresis
-
D.
Western blotting
Solution
Karyotyping is a laboratory technique used to visualize and analyze the number and structure of chromosomes.
Correct Answer:
B
— Karyotyping
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Q. Which of the following techniques is commonly used to determine the sequence of amino acids in a peptide?
-
A.
Nuclear magnetic resonance (NMR)
-
B.
Mass spectrometry
-
C.
X-ray crystallography
-
D.
Electrophoresis
Solution
Mass spectrometry is a widely used technique for determining the sequence of amino acids in peptides.
Correct Answer:
B
— Mass spectrometry
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Q. Which of the following techniques is used to introduce recombinant DNA into host cells?
-
A.
Electroporation
-
B.
PCR
-
C.
Gel electrophoresis
-
D.
Western blotting
Solution
Electroporation is a technique used to introduce recombinant DNA into host cells by applying an electrical field to increase cell permeability.
Correct Answer:
A
— Electroporation
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Q. Which of the following traits can be introduced into transgenic plants?
-
A.
Herbicide resistance
-
B.
Increased susceptibility to diseases
-
C.
Reduced growth rate
-
D.
Lower nutritional content
Solution
Herbicide resistance is a trait that can be introduced into transgenic plants, allowing them to survive applications of certain herbicides.
Correct Answer:
A
— Herbicide resistance
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Q. Which of the following traits is often targeted for improvement through plant breeding?
-
A.
Disease resistance
-
B.
Nutritional content
-
C.
Drought tolerance
-
D.
All of the above
Solution
Plant breeding often targets multiple traits, including disease resistance, nutritional content, and drought tolerance.
Correct Answer:
D
— All of the above
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Q. Which of the following treatments is commonly used for HIV infection?
-
A.
Antibiotics
-
B.
Antiretroviral therapy
-
C.
Vaccines
-
D.
Corticosteroids
Solution
Antiretroviral therapy (ART) is the standard treatment for HIV infection.
Correct Answer:
B
— Antiretroviral therapy
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Q. Which of the following tumors is classified as a sarcoma?
-
A.
Adenocarcinoma
-
B.
Osteosarcoma
-
C.
Basal cell carcinoma
-
D.
Melanoma
Solution
Osteosarcoma is classified as a sarcoma, which is a malignant tumor arising from connective tissues, while the others are carcinomas.
Correct Answer:
B
— Osteosarcoma
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Q. Which of the following vectors can carry the largest DNA inserts?
-
A.
Plasmid vectors
-
B.
Viral vectors
-
C.
Bacterial artificial chromosomes
-
D.
Cosmids
Solution
Bacterial artificial chromosomes (BACs) can carry larger DNA inserts compared to plasmids, viral vectors, or cosmids.
Correct Answer:
C
— Bacterial artificial chromosomes
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Q. Which of the following viruses is associated with the development of cervical cancer?
-
A.
Hepatitis B virus
-
B.
Human papillomavirus (HPV)
-
C.
Cytomegalovirus
-
D.
Epstein-Barr virus
Solution
Human papillomavirus (HPV) is strongly associated with the development of cervical cancer.
Correct Answer:
B
— Human papillomavirus (HPV)
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Q. Which of the following viruses is known for causing severe acute respiratory syndrome (SARS)?
-
A.
Influenza virus
-
B.
SARS-CoV
-
C.
MERS-CoV
-
D.
Hantavirus
Solution
SARS is caused by the SARS coronavirus (SARS-CoV).
Correct Answer:
B
— SARS-CoV
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