Which of the following is a nitrogenous base found in DNA but not in RNA?

 The largest organ in the human body is the:

Which of the following is a correct pair of a disease and its related malfunctioning organ?

The basic structural and functional unit of life is:

Which of the following is a disaccharide?

Which of the following is a function of the skeletal system?

Which vitamin is produced by the human body when exposed to sunlight?

In humans, the number of chromosomes in a somatic cell is:

Which of the following is a decomposer in an ecosystem?

Enzymes function by:

Which hormone causes ovulation?

 In photosynthesis, the light-dependent reactions take place in the:

Goitre occurs due to a deficiency of:

During DNA replication, the enzyme that joins Okazaki fragments on the lagging strand is:

The process by which plants lose water vapor through their leaves is:

The human digestive system begins in the:

Which of the following is a renewable resource?

The gradual and fairly predictable change in the species composition of a given area is called:

Which part of the flower develops into a fruit after fertilization?

The largest gland in the human body is the:

Which hormone decreases blood calcium?

The enzyme pepsin, which begins protein digestion in the stomach, is secreted in its inactive form called:

The scientific study of heredity is called:

 In the electron transport chain, the movement of protons (H+) from the intermembrane space into the mitochondrial matrix occurs through which specific protein complex?

Which of the following is a decomposer in an ecosystem?

 A child is diagnosed with a genetic disorder characterized by a buildup of phenylalanine in the body due to a defective enzyme. This disorder is:

In which organelle does cellular respiration primarily occur?

The human respiratory system includes all EXCEPT:

Mendel is known as the father of:

The structure formed by the wrapping of an axon by Schwann cells is called:

Which part of the human brain is responsible for coordinating voluntary movements and maintaining posture and balance?

Which kingdom includes algae and protozoa?

 The phase of mitosis where chromosomes align at the equatorial plate is:

Which of these is NOT a part of the digestive system?

In humans, fertilization normally occurs in the:

Which hormone regulates blood sugar levels?

Which of the following is a greenhouse gas that contributes to global warming?

The process by which plants make their own food using sunlight is called:

Which organelle is responsible for protein synthesis?

In a typical ecosystem, which trophic level has the maximum biomass?

The central nervous system consists of:

The part of the neuron that receives signals from other neurons is the:

Which of the following is a characteristic feature of angiosperms?

In the human heart, the chamber that pumps oxygenated blood to the body via the aorta is the:

The process of cell division that results in two identical daughter cells is:

In a food chain, grass is eaten by a grasshopper, which is eaten by a frog, which is eaten by a snake. The secondary consumer is the:

Haemophilia is a:

The light-independent reactions (Calvin Cycle) of photosynthesis occur in t

 Insulin and glucagon are hormones secreted by the pancreas that regulate blood glucose levels. They are secreted by the:

In a population in Hardy-Weinberg equilibrium, the frequency of the recessive allele for a trait is 0.3. What is the frequency of heterozygous individuals in the population?

The part of the neuron that receives incoming signals from other neurons is the:

The causative agent of Tuberculosis is:

Absorption of food is greatest in the:

The primary electron acceptor in Photosystem II (PSII) is:

The main hormone for growth in children is:

Which of the following statements correctly describes the difference between oxidative and substrate-level phosphorylation?

Which cells secrete glucagon?

Which of the following is a unicellular organism?

 In a population in Hardy-Weinberg equilibrium, the frequency of the recessive allele is 0.3. What is the frequency of heterozygous individuals?

The main function of roots in plants is:

During which phase of mitosis do the sister chromatids separate and move to opposite poles of the cell?

Which of the following is a biotic factor in an ecosystem?

 In plants, the vascular tissue responsible for transporting organic nutrients (sugars) from leaves to other parts is the:

The enzyme that digests proteins in the stomach is:

Which gland is both endocrine and exocrine?

The kingdom that includes organisms like algae and protozoa, which are primarily unicellular and eukaryotic, is:

An individual suffers from a disease where their immune system attacks the myelin sheaths of their own neurons. This is an example of:

Which of the following best describes the role of tRNA in protein synthesis?

Which of the following is a characteristic of C4 plants but not C3 plants?

Which type of junction creates a tight seal between adjacent animal cells, preventing leakage of extracellular fluid?

Which part of the brain is responsible for coordinating muscle movements and maintaining balance?

In a population, the total aggregate of genes is called the:

DNA replication is:

Which of the following is a function of the liver?

In the nephron, most reabsorption of water and solutes occurs in the:

The smallest bone in the human body is found in the:

 Photosynthesis primarily occurs in which part of the plant cell?

Which of the following is a communicable disease?

During protein synthesis, the process of transcription occurs in the:

In the human respiratory system, gas exchange occurs in the:

Which part of the brain controls balance and coordination?

 The process by which DNA makes a copy of itself is called:

In the lac operon of E. coli, lactose acts as a(n):

TSH (Thyroid-Stimulating Hormone) acts on the:

During the light-dependent reactions of photosynthesis, the primary function of photosystem II is to:

Which organelle is primarily responsible for the synthesis of phospholipids and steroids?

Blood clotting requires:

The process by which mRNA is synthesized from a DNA template is called:

The hormone that promotes cell elongation in plants is:

Which of the following is a density-dependent factor that can limit population growth?

In plants, the Casparian strip is located in the:

The primary function of the Calvin cycle is to:

The process of water movement through a plant and evaporation from leaves is called:

Which stage of cellular respiration produces the majority of ATP?

Myelin sheath, which speeds up nerve impulse conduction, is produced by which cells in the central nervous system?

 In humans, the role of bile in digestion is to:

Which of the following is NOT a part of the cell theory?

Which blood cells are responsible for carrying oxygen?

A non-competitive inhibitor of an enzyme:

Which gas do plants absorb from the atmosphere during photosynthesis?

Which blood type is known as the universal donor?

 Which of the following is an example of a density-independent factor that could limit population growth?

Photosynthesis occurs in which part of the plant cell?

In the human eye, the part that controls the amount of light entering is the:

A competitive inhibitor of an enzyme:

The process of copying DNA into mRNA is called:

Which of the following correctly describes the direction of impulse transmission in a neuron?

A point mutation that changes a codon coding for an amino acid into a stop codon is called a:

A man with blood group A (genotype IAi) marries a woman with blood group B (genotype IBi). What is the possible blood group of their offspring?

Which of the following is an example of a sex-linked recessive disorder?

Which of the following is a function of the liver?

The process by which organisms maintain a stable internal environment is called:

 In humans, the XX chromosomes correspond to:

According to Mendel's law of segregation:

In the lac operon of E. coli, the repressor protein is inactivated by binding to:

The scientific name of the human species is:

In humans, the tube that connects the kidney to the urinary bladder is the:

In the Hardy-Weinberg principle, which condition is NOT required for a population to be in genetic equilibrium?

The exchange of gases in the lungs occurs through the process of:

Which vitamin is fat-soluble and its deficiency can lead to night blindness?

Which of the following conveys the longest-lasting immunity to an infectious agent?

Dwarfism is due to a deficiency of:

Anticodons are present on:

Which type of blood vessel carries blood away from the heart?

Which of the following is NOT a function of the vertebrate skeleton?

A woman with blood type A (whose father was type O) marries a man with blood type B (whose father was type O). What is the probability that their first child will have blood type O?

A permanent change in the DNA sequence of a gene is called a:

A man with a normally pigmented father and an albino mother has a child with an albino woman. What is the probability that their first child will be albino? (Assume albinism is an autosomal recessive trait).

 In a DNA molecule, if the sequence of one strand is 5'-ATGCGT-3', the complementary strand will be:

Which of the following is an example of analogous structures?

The process by which populations change over time through genetic variation and natural selection is called:

Which of the following statements about the Krebs cycle is correct?

The smallest bone in the human body is found in the:

The functional unit of the kidney where filtration, reabsorption, and secretion occur is the:

The main function of the mitochondria is:

The basic structural and functional unit of life is the:

The theory of evolution by natural selection was primarily proposed by:

Which of the following is NOT a function of the liver?

The process by which plants lose water vapor through their leaves is called:

Which plant hormone promotes cell elongation and is involved in phototropism?

A patient presents with muscle cramps and fatigue. A blood test reveals low sodium levels. This imbalance is most likely due to improper functioning of which hormone?

The part of the human ear that converts sound vibrations into electrical signals is the:

Which of the following is a correct pathway for the flow of blood in the human heart?

The process of cell division that results in two identical daughter cells is called:

 A man with blood group A (genotype IAi) and a woman with blood group B (genotype IBi) can have a child with which of the following blood groups?

Which of the following hormones is NOT produced by the anterior pituitary gland?

The process by which plants respond to light is called:

In a food chain, if the energy available at the producer level is 10,000 J, what is the approximate energy available to a tertiary consumer?

Which vitamin is produced by the human body when exposed to sunlight?

Which of the following is an example of an innate behavior?

The final electron acceptor in the aerobic respiration electron transport chain is:

The largest lymphoid tissue in the body is the:

The molecule that carries genetic information in most organisms is:

A person who has the antigen B on the surface of their red blood cells has a blood type of ______ and can receive blood from ______.

Which plant hormone is primarily involved in promoting cell elongation and is responsive to light and gravity?

During the contraction of a sarcomere in muscle fibers, which of the following regions shortens?

Which component of blood is responsible for carrying oxygen?

Which of these is a density-dependent limiting factor in population ecology?

Hyposecretion of ADH causes:

Which part of the human brain is responsible for controlling balance and coordination?

Which hormone is released during stress?

Double fertilization is a characteristic of:

Which part of the flower develops into a fruit?

Cushing's syndrome is due to an excess of:

Which of the following is a greenhouse gas?

 Which organelle is known as the "powerhouse of the cell"?

Which of the following is NOT a type of RNA?

The main function of white blood cells is to:

Which of the following is a micronutrient required by plants?

DNA replication occurs during which phase of the cell cycle?

 The human heart has how many chambers?

The movement of water from the soil into the root xylem, without entering the living cells, is through the:

Which of the following is a disaccharide?

During inhalation in humans, which of the following occurs?

The human heart has how many chambers?

Which of the following is a function of the skeletal system?

Which of the following cells of the immune system are responsible for producing antibodies?

Which organ is responsible for filtering blood and producing urine?

 In a dihybrid cross (AaBb x AaBb), what is the phenotypic ratio in the F2 generation if the genes assort independently?

 During DNA replication, the enzyme that synthesizes the new DNA strand by adding nucleotides is:

Which vitamin deficiency causes rickets?

Which of the following is a characteristic feature of prokaryotic cells?

In ecological terms, organisms that produce their own food are called:

The largest gland in the human body is the:

The largest store of energy in the body is in the form of:

The process by which a piece of a chromosome breaks off and attaches to another chromosome is known as:

A plant with the genotype TtYy (where T=tall, t=short, Y=yellow seeds, y=green seeds) is self-crossed. What proportion of the offspring will be tall with green seeds?

In a dihybrid cross between two heterozygous individuals (RrYy × RrYy), what proportion of the offspring would be expected to show both recessive traits?

The process of double fertilization is a unique characteristic of:

The process of converting light energy into chemical energy occurs during:

In the genetic code, a sequence of three bases is called a:

In a food chain, if the primary producer has 10,000 units of energy, approximately how much energy would be available to a tertiary consumer?

The theory of natural selection was proposed by:

Which blood cells are responsible for carrying oxygen?

Which blood vessels carry blood away from the heart?

In a classic DNA semi-conservative replication experiment, if bacteria are grown in a medium containing 15N (heavy isotope) and then transferred to a medium containing 14N (light isotope) for two generations, what would be the ratio of hybrid DNA (15N-14N) to light DNA (14N-14N)?

The dark reaction of photosynthesis (Calvin cycle) occurs in the:

In an ecosystem, the primary consumers are always:

In the fluid mosaic model of the plasma membrane, what do the "mosaic" aspects represent?

Which of the following is a sex-linked disorder?