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#1
By TheQuizWire
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Medium
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Fact Checked
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23 Jan 2026
What is the expected phenotypic ratio of offspring from a monohybrid cross between two heterozygous parents?
💡 Explanation:A monohybrid cross between two heterozygous parents (e.g., Bb x Bb) results in offspring with a genotypic ratio of 1 (BB): 2 (Bb): 1 (bb). Assuming B is dominant, the offspring will exhibit two phenotypes: the dominant trait (BB and Bb) and the recessive trait (bb). This combination yields the classic Mendelian phenotypic ratio of 3:1.
#2
By TheQuizWire
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Hard
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Fact Checked
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25 Dec 2025
Which describes the ion movement ratio powered by the Na+/K+-ATPase pump?
💡 Explanation:The Na+/K+-ATPase pump is a primary active transport mechanism crucial for maintaining the resting membrane potential and cell volume. It hydrolyzes one molecule of ATP to actively transport three Na+ ions out of the cell and two K+ ions into the cell, creating an essential electrochemical gradient.
#3
By TheQuizWire
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Medium
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Fact Checked
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18 Dec 2025
A cell specializing in high-volume active transport would be rich in which organelle?
💡 Explanation:Active transport requires a significant input of cellular energy, typically supplied by Adenosine Triphosphate (ATP). Mitochondria are the 'powerhouses' of the cell, serving as the primary site for ATP synthesis (cellular respiration). Therefore, cells with high energy demands, such as those involved in high-volume active transport (e.g., kidney tubule cells, nerve cells), possess a high density of mitochondria.
#4
By TheQuizWire
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Medium
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Fact Checked
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14 Dec 2025
How does increased atmospheric $text{CO}_2$ concentration generally affect the photorespiration rate in $text{C}_3$ plants?
💡 Explanation:In $text{C}_3$ plants, the enzyme $text{RuBisCO}$ catalyzes two competing reactions: carboxylation (photosynthesis) and oxygenation (photorespiration). An increased concentration of $text{CO}_2$ relative to $text{O}_2$ kinetically favors the carboxylation reaction over the oxygenation reaction, leading to a reduced rate of photorespiration.
#5
By TheQuizWire
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Medium
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Fact Checked
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11 Dec 2025
Which process produces four genetically diverse daughter cells with half the parent cell’s chromosome number?
💡 Explanation:Meiosis is a two-stage nuclear division process that results in four daughter cells, each containing half the number of chromosomes (haploid) of the parent cell. It is also characterized by genetic recombination (crossing over), leading to genetically diverse cells, which are the gametes (sex cells). Mitosis, in contrast, results in two genetically identical, diploid daughter cells.
#6
By TheQuizWire
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Medium
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Fact Checked
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09 Dec 2025
What is the primary role of mitochondria in a eukaryotic cell?
💡 Explanation:Mitochondria are often called the 'powerhouse of the cell' because they are the site of aerobic respiration, which is the process that generates the majority of the cell's supply of Adenosine Triphosphate (ATP), the molecule used as the primary energy currency.
#7
By TheQuizWire
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Hard
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Fact Checked
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06 Dec 2025
Which factor primarily determines the functional three-dimensional shape (conformation) of a mature protein?
💡 Explanation:The primary structure of a protein is the unique, linear sequence of amino acids linked by peptide bonds. This sequence dictates the formation of secondary structures (alpha-helices and beta-sheets), which in turn determines the final tertiary structure (the unique 3D folding). Therefore, the amino acid sequence is the fundamental determinant of a protein's functional conformation. While environment (A), quaternary structure (C, if applicable), and cofactors (D) influence stability and activity, they do not primarily determine the inherent folding pattern.
#8
By TheQuizWire
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Hard
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Fact Checked
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05 Dec 2025
A non-competitive inhibitor binds to an enzyme. What is the expected effect on $V_{max}$ and $K_m$?
💡 Explanation:Non-competitive inhibitors bind to the enzyme at an allosteric site, not the active site. This alters the enzyme's conformation, reducing its catalytic efficiency (lowering $V_{max}$), but it does not interfere with the substrate's ability to bind to the active site. Therefore, the substrate affinity ($K_m$) remains unchanged. The competitive inhibitor rule is A, and the uncompetitive inhibitor rule is B.
#9
By TheQuizWire
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Easy
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17 Nov 2025
What process do plants use to convert light energy into glucose?
💡 Explanation:Photosynthesis is the biological process where plants use sunlight, water, and CO2 to produce glucose and oxygen.
#10
By TheQuizWire
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Easy
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16 Nov 2025
What is the fundamental unit of heredity composed of DNA?
💡 Explanation:A gene is a distinct sequence of nucleotides forming part of a chromosome, serving as the basic unit of heredity.
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