Q. What is the function of the seminal vesicles? (2021)
A.
To produce sperm
B.
To provide nutrients to sperm
C.
To store sperm
D.
To produce testosterone
Show solution
Solution
The seminal vesicles produce a fluid that provides nutrients to sperm and helps form semen.
Correct Answer: B — To provide nutrients to sperm
Learn More →
Q. What is the function of the sepals in a flower? (2020)
A.
Attract pollinators
B.
Protect the flower bud
C.
Produce pollen
D.
Support the flower
Show solution
Solution
Sepals protect the flower bud before it opens.
Correct Answer: B — Protect the flower bud
Learn More →
Q. What is the function of the stigma in a flower? (2022)
A.
To attract pollinators
B.
To produce pollen
C.
To receive pollen
D.
To protect ovules
Show solution
Solution
The stigma is the part of the flower that receives pollen during pollination, allowing fertilization to occur.
Correct Answer: C — To receive pollen
Learn More →
Q. What is the function of the style in a flower? (2023)
A.
To support the anther
B.
To connect stigma and ovary
C.
To attract pollinators
D.
To produce nectar
Show solution
Solution
The style is the slender stalk that connects the stigma to the ovary, allowing pollen to travel to the ovules.
Correct Answer: B — To connect stigma and ovary
Learn More →
Q. What is the function of the synaptic cleft? (2022)
A.
To transmit electrical impulses
B.
To separate two neurons
C.
To store neurotransmitters
D.
To protect the neuron
Show solution
Solution
The synaptic cleft is the small gap between two neurons where neurotransmitters are released to facilitate communication.
Correct Answer: B — To separate two neurons
Learn More →
Q. What is the function of the Taq polymerase in PCR? (2023)
A.
To cut DNA
B.
To synthesize DNA
C.
To ligate DNA fragments
D.
To denature DNA
Show solution
Solution
Taq polymerase is a heat-stable enzyme used in PCR to synthesize new DNA strands by extending primers during the amplification process.
Correct Answer: B — To synthesize DNA
Learn More →
Q. What is the function of the villi in the small intestine? (2019)
A.
Increase surface area for absorption
B.
Secrete digestive enzymes
C.
Produce bile
D.
Store nutrients
Show solution
Solution
Villi increase the surface area of the small intestine, enhancing nutrient absorption.
Correct Answer: A — Increase surface area for absorption
Learn More →
Q. What is the function of the xylem in flowering plants? (2023)
A.
Transport of nutrients
B.
Transport of water
C.
Photosynthesis
D.
Storage of food
Show solution
Solution
Xylem is responsible for the transport of water and minerals from the roots to the rest of the plant.
Correct Answer: B — Transport of water
Learn More →
Q. What is the function of villi in the small intestine? (2019)
A.
Secretion of enzymes
B.
Absorption of nutrients
C.
Production of bile
D.
Storage of food
Show solution
Solution
Villi increase the surface area of the small intestine, enhancing the absorption of nutrients.
Correct Answer: B — Absorption of nutrients
Learn More →
Q. What is the functional unit of the lung where gas exchange occurs? (2019)
A.
Bronchi
B.
Alveoli
C.
Trachea
D.
Larynx
Show solution
Solution
Alveoli are the tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
Correct Answer: B — Alveoli
Learn More →
Q. What is the genetic material in most living organisms? (2023)
A.
RNA
B.
DNA
C.
Protein
D.
Carbohydrate
Show solution
Solution
DNA (deoxyribonucleic acid) is the genetic material that carries the instructions for life.
Correct Answer: B — DNA
Learn More →
Q. What is the jelly-like substance inside the cell called? (2018)
A.
Nucleoplasm
B.
Cytoplasm
C.
Protoplasm
D.
Chloroplast
Show solution
Solution
Cytoplasm is the jelly-like substance that fills the cell and contains organelles.
Correct Answer: B — Cytoplasm
Learn More →
Q. What is the main advantage of asexual reproduction? (2023)
A.
Genetic diversity
B.
Faster population growth
C.
Requires two parents
D.
Involves gametes
Show solution
Solution
Asexual reproduction allows for faster population growth since it does not require finding a mate.
Correct Answer: B — Faster population growth
Learn More →
Q. What is the main advantage of sexual reproduction? (2023)
A.
Faster reproduction
B.
Genetic variation
C.
Less energy required
D.
No need for a mate
Show solution
Solution
Sexual reproduction promotes genetic variation, which is beneficial for adaptation and evolution.
Correct Answer: B — Genetic variation
Learn More →
Q. What is the main advantage of using biopesticides? (2022)
A.
They are more effective than chemical pesticides
B.
They are environmentally friendly
C.
They are cheaper to produce
D.
They have a longer shelf life
Show solution
Solution
Biopesticides are derived from natural materials and are considered environmentally friendly compared to chemical pesticides.
Correct Answer: B — They are environmentally friendly
Learn More →
Q. What is the main advantage of using CRISPR technology in genetic engineering? (2021)
A.
High precision
B.
Low cost
C.
Speed of modification
D.
All of the above
Show solution
Solution
CRISPR technology offers high precision, low cost, and speed of modification, making it a powerful tool in genetic engineering.
Correct Answer: D — All of the above
Learn More →
Q. What is the main advantage of using genetically modified organisms (GMOs) in agriculture? (2021)
A.
Higher nutritional value
B.
Increased resistance to diseases
C.
Lower production costs
D.
All of the above
Show solution
Solution
GMOs can provide higher nutritional value, increased resistance to diseases, and lower production costs.
Correct Answer: D — All of the above
Learn More →
Q. What is the main advantage of using genetically modified organisms (GMOs) in food production? (2020)
A.
Higher prices
B.
Longer shelf life
C.
Increased labor costs
D.
More complex farming techniques
Show solution
Solution
GMOs can be engineered to have longer shelf lives, reducing food waste and improving food security.
Correct Answer: B — Longer shelf life
Learn More →
Q. What is the main advantage of using genetically modified organisms in food production? (2021)
A.
Longer shelf life
B.
Higher nutritional value
C.
Resistance to pests and diseases
D.
All of the above
Show solution
Solution
Genetically modified organisms can provide multiple advantages including longer shelf life, higher nutritional value, and resistance to pests and diseases.
Correct Answer: D — All of the above
Learn More →
Q. What is the main advantage of using hormonal contraceptives? (2023)
A.
They are 100% effective
B.
They can regulate menstrual cycles
C.
They are inexpensive
D.
They require no medical consultation
Show solution
Solution
Hormonal contraceptives can help regulate menstrual cycles in addition to preventing pregnancy.
Correct Answer: B — They can regulate menstrual cycles
Learn More →
Q. What is the main advantage of using transgenic animals in research? (2021)
A.
Increased lifespan
B.
Disease modeling
C.
Higher reproduction rate
D.
Better growth rate
Show solution
Solution
Transgenic animals are primarily used in research for disease modeling, helping scientists understand human diseases.
Correct Answer: B — Disease modeling
Learn More →
Q. What is the main advantage of using transgenic plants? (2022)
A.
Higher nutritional value
B.
Increased growth rate
C.
Resistance to herbicides
D.
Faster reproduction
Show solution
Solution
Transgenic plants are engineered to be resistant to herbicides, allowing for easier weed management.
Correct Answer: C — Resistance to herbicides
Learn More →
Q. What is the main advantage of using yeast as a host for cloning? (2023)
A.
High growth rate
B.
Eukaryotic post-translational modifications
C.
Simple genome
D.
Low cost
Show solution
Solution
Yeast, being a eukaryote, can perform post-translational modifications similar to higher organisms, making it advantageous for expressing eukaryotic proteins.
Correct Answer: B — Eukaryotic post-translational modifications
Learn More →
Q. What is the main application of CRISPR technology? (2023)
A.
Gene therapy
B.
Gene editing
C.
DNA sequencing
D.
Protein synthesis
Show solution
Solution
CRISPR technology is primarily used for gene editing, allowing precise modifications to DNA.
Correct Answer: B — Gene editing
Learn More →
Q. What is the main cause of tuberculosis? (2019)
A.
Bacterial infection
B.
Viral infection
C.
Fungal infection
D.
Parasitic infection
Show solution
Solution
Tuberculosis is primarily caused by the bacterium Mycobacterium tuberculosis.
Correct Answer: A — Bacterial infection
Learn More →
Q. What is the main characteristic of cardiac muscle tissue? (2023)
A.
Multinucleated
B.
Involuntary and striated
C.
Non-striated and voluntary
D.
Highly regenerative
Show solution
Solution
Cardiac muscle tissue is involuntary and striated, found only in the heart, and is responsible for pumping blood.
Correct Answer: B — Involuntary and striated
Learn More →
Q. What is the main characteristic of mammals? (2021)
A.
Cold-blooded
B.
Feathers
C.
Hair or fur
D.
Scales
Show solution
Solution
Mammals are characterized by the presence of hair or fur and mammary glands that produce milk.
Correct Answer: C — Hair or fur
Learn More →
Q. What is the main characteristic of organisms in the phylum Porifera? (2022)
A.
Presence of a true coelom
B.
Body symmetry
C.
Presence of pores
D.
Presence of a notochord
Show solution
Solution
Organisms in the phylum Porifera, commonly known as sponges, are characterized by the presence of pores in their body.
Correct Answer: C — Presence of pores
Learn More →
Q. What is the main characteristic of the phylum Mollusca? (2021)
A.
Jointed legs
B.
Soft-bodied with a hard shell
C.
Radial symmetry
D.
Exoskeleton made of chitin
Show solution
Solution
Mollusca are primarily soft-bodied animals, many of which have a hard shell for protection.
Correct Answer: B — Soft-bodied with a hard shell
Learn More →
Q. What is the main characteristic of the phylum Porifera? (2021)
A.
Presence of a true coelom
B.
Body symmetry
C.
Presence of pores
D.
Presence of a notochord
Show solution
Solution
Porifera, or sponges, are characterized by the presence of numerous pores (ostia) in their body.
Correct Answer: C — Presence of pores
Learn More →
Showing 151 to 180 of 1294 (44 Pages)