#1
Which cellular process produces ATP?
Krebs cycle
ExplanationKrebs cycle produces ATP through cellular respiration.
#2
What is the primary function of mitosis?
To produce genetically identical daughter cells
ExplanationMitosis ensures genetic stability by producing identical daughter cells.
#3
Which process involves the exchange of genetic material between homologous chromosomes?
Meiosis
ExplanationMeiosis promotes genetic diversity through recombination.
#4
What is the main function of the centrioles during cell division?
To anchor spindle fibers
ExplanationCentrioles organize spindle fibers for chromosome segregation.
#5
What is the purpose of crossing over during meiosis?
To exchange genetic material between homologous chromosomes
ExplanationCrossing over enhances genetic diversity by swapping DNA segments.
#6
Which of the following is a product of photosynthesis?
Glucose
ExplanationGlucose is produced through the photosynthetic process.
#7
What is the primary function of the cell membrane?
To control the movement of substances into and out of the cell
ExplanationCell membrane regulates the passage of molecules in and out of the cell.
#8
Which organelle is responsible for breaking down cellular waste and debris?
Lysosome
ExplanationLysosomes degrade waste and cellular debris through enzymatic action.
#9
Which molecule serves as the universal energy currency of the cell?
ATP
ExplanationATP stores and transfers energy within cells for various metabolic processes.
#10
What is the main function of the chloroplast?
Photosynthesis
ExplanationChloroplasts are the site of photosynthesis, converting light energy into chemical energy.
#11
Which of the following is NOT a stage of cellular respiration?
Calvin cycle
ExplanationCalvin cycle is part of photosynthesis, not cellular respiration.
#12
During which phase of the cell cycle does DNA replication occur?
S phase
ExplanationDNA replication occurs during the Synthesis (S) phase.
#13
Which organelle is responsible for protein synthesis?
Endoplasmic reticulum
ExplanationEndoplasmic reticulum facilitates protein synthesis and modification.
#14
What is the function of the spindle fibers during mitosis?
To separate sister chromatids
ExplanationSpindle fibers segregate chromatids to opposite poles during mitosis.
#15
What is the role of the enzyme DNA polymerase during DNA replication?
To join Okazaki fragments
ExplanationDNA polymerase catalyzes the formation of phosphodiester bonds between nucleotides.
#16
Which phase of the cell cycle is characterized by cell growth and preparation for DNA replication?
G1 phase
ExplanationG1 phase involves cellular growth and preparation for DNA synthesis.
#17
During which stage of cellular respiration is the majority of ATP produced?
Electron transport chain
ExplanationElectron transport chain generates the majority of ATP during cellular respiration.
#18
What is the correct sequence of phases in mitosis?
Prophase, metaphase, anaphase, telophase
ExplanationMitosis progresses through prophase, metaphase, anaphase, and telophase.
#19
Which of the following structures is responsible for packaging and modifying proteins for secretion?
Golgi apparatus
ExplanationGolgi apparatus processes and packages proteins for secretion or use within the cell.
#20
During which phase of the cell cycle do chromosomes align along the metaphase plate?
Metaphase
ExplanationChromosomes align at the metaphase plate during metaphase of mitosis.
#21
What is the role of telomeres in cellular reproduction?
They protect the ends of chromosomes from deterioration
ExplanationTelomeres protect chromosomal integrity by preventing degradation.
#22
Which process contributes to genetic diversity among offspring?
Meiosis
ExplanationMeiosis generates genetically diverse gametes through recombination.
#23
What is the main difference between asexual and sexual reproduction?
Asexual reproduction produces genetically identical offspring, sexual reproduction produces genetically diverse offspring.
ExplanationAsexual reproduction creates clones while sexual reproduction fosters genetic variation.
#24
What is the name of the process by which mRNA is translated into a protein?
Translation
ExplanationTranslation converts mRNA codons into amino acids to synthesize proteins.
#25
What is the primary function of RNA polymerase?
To synthesize RNA from a DNA template
ExplanationRNA polymerase catalyzes the transcription of RNA from DNA.