#1
Which of the following is not a primary tissue type in animals?
Skeletal tissue
ExplanationConnective tissue, epithelial tissue, and muscle tissue are primary tissue types in animals, not skeletal tissue.
#2
What is the function of the Golgi apparatus in cells?
Protein modification and sorting
ExplanationThe Golgi apparatus processes, modifies, and sorts proteins synthesized in the endoplasmic reticulum before they are transported to their final destinations.
#3
Which of the following is NOT a stage of embryonic development in humans?
Larva
ExplanationLarva is not a stage of embryonic development in humans; instead, it is a developmental stage in organisms such as insects with indirect development.
#4
Which of the following is NOT a function of the cell membrane?
Producing energy for the cell
ExplanationThe cell membrane primarily functions in maintaining cell integrity, regulating transport, and cell signaling, but it does not produce energy for the cell, which is the role of organelles like mitochondria.
#5
What is the primary function of the endocrine system?
Producing and secreting hormones
ExplanationThe endocrine system regulates various physiological processes by producing and secreting hormones that act as chemical messengers, coordinating activities throughout the body.
#6
Which of the following is NOT a component of the central nervous system?
Peripheral nerves
ExplanationThe central nervous system consists of the brain and spinal cord, while peripheral nerves belong to the peripheral nervous system.
#7
What is the role of mitosis in biological development?
To produce genetically identical daughter cells
ExplanationMitosis facilitates growth, repair, and asexual reproduction by producing genetically identical daughter cells.
#8
Which of the following is an example of a homeobox gene?
Pax6
ExplanationPax6 is an example of a homeobox gene involved in regulating development and organogenesis.
#9
What is the term for the process by which cells become specialized in structure and function?
Differentiation
ExplanationDifferentiation is the process by which cells acquire specialized functions and structures.
#10
What is the primary function of the respiratory system?
Exchanging gases
ExplanationThe primary function of the respiratory system is to facilitate the exchange of oxygen and carbon dioxide between the body and the environment.
#11
Which of the following is a characteristic of stem cells?
They can differentiate into various cell types
ExplanationStem cells have the ability to differentiate into various specialized cell types, contributing to tissue repair and regeneration.
#12
What is the purpose of meiosis in sexual reproduction?
To produce gametes with half the chromosome number
ExplanationMeiosis reduces the chromosome number by half in gametes, ensuring genetic diversity in offspring during sexual reproduction.
#13
Which of the following structures is responsible for the production of insulin in humans?
Pancreas
ExplanationThe pancreas is responsible for producing insulin in humans, which regulates glucose metabolism.
#14
What is the function of the enzyme DNA polymerase during DNA replication?
To add nucleotides to the new DNA strand
ExplanationDNA polymerase catalyzes the addition of nucleotides to the growing DNA strand during DNA replication, ensuring accurate duplication of genetic information.
#15
Which of the following is NOT a characteristic of eukaryotic cells?
Smaller size compared to prokaryotic cells
ExplanationEukaryotic cells are typically larger and more complex than prokaryotic cells, featuring membrane-bound organelles and a nucleus.
#16
What is the function of white blood cells in the immune system?
Producing antibodies
ExplanationWhite blood cells, specifically B lymphocytes, produce antibodies that recognize and neutralize pathogens, contributing to the body's immune response.
#17
Which of the following is NOT a component of the cardiovascular system?
Brain
ExplanationThe cardiovascular system consists of the heart, blood vessels, and blood, while the brain is part of the nervous system, involved in processing and coordinating sensory data.