SZABMU 2025 Past Paper

Which of the following hormones in the body of an animal is lipid-based in nature?

Which of the following base pairing maintains the constant diameter of the DNA double helix as per Watson and Crick's model?

Which muscle type is under conscious control and is multinucleated?

In a chromosome, positively charged histone proteins are organized with negatively charged DNA. The positive charges of histone are due to an abundance of basic amino acids:

The envelope in a virus is derived from:

Myelin sheath acts as a/an:

Which of the following connective tissues is completely avascular and heals slowly?

Cardiac muscles are different from skeletal muscles because they:

Which organelle gives rise to primary lysosomes budding in eukaryotic cells?

DNA/RNA probes are most commonly used as:

What is the event that occurs first during skeletal muscle contraction?

When genes are linked, they tend to:

A mutation prevents proper disulfide bond formation in a fibrous protein, causing brittle nails and slow hair growth. Which proteinaceous substance is affected?

In muscle fibers, T-tubules are extensions of the sarcolemma that penetrate into the cell's interior. What is their main function?

Polysaccharides such as starch and glycogen are mainly used for:

According to Morgan's experiment, which of the following is essential for detecting gene linkage accurately?

The end of a skeletal muscle attached to a movable bone is the:

Which of the following is common between aldosterone, sex hormones, and cortisone?

Which one of the following organisms is uricotelic with reference to excretion of nitrogenous compounds?

Ureotelism (removal of nitrogenous waste in the form of urea) is an adaptation to:

All of the following are characteristics of the limbic system EXCEPT:

Sensory input from auditory and visual pathways, skin, and within the body is received by the ____ and distributed to the ____.

According to the Lamarck theory of evolution, an organ that has not been used in several generations will:

Which statement is incorrect with reference to enzyme action?

The temperature of underground water remains relatively constant due to water's:

The shape of an Adenovirus is:

In a human female, normal ovulation occurs on which day of the menstrual cycle?

HIV belongs to which class of virus with respect to genome type?

How many ATPs are produced during the oxidative phase of glycolysis?

Which of the following best describes the relationship between the endoplasmic reticulum (ER) and Golgi apparatus?

Decreased levels of FSH hormone during the menstrual cycle ultimately trigger the release of:

A carrier mother for hemophilia and a normal father can produce:

During ventricular systole, which pressure change occurs?

Which cell type is essential for stimulating cell division of both B-cells and T-cells?

The hormone that, when overproduced, can lead to hypercalcemia and stone formation is:

Fibrocartilage is found in the:

Additional capillaries present in juxtamedullary nephrons that form a loop of vessels are the:

Thinking, memory, and voluntary actions are mainly controlled by the:

Ventricular diastole directly causes:

Which organelle serves as a packaging and distribution center for molecules within the cell?

Which of the following hormones is not produced in significant amounts in older women?

Which lymphatic structure absorbs dietary fats in the intestine?

After a liver transplant, doctors suppress the patient's T-lymphocyte activity. Why?

How do the kidneys contribute to maintaining normal blood calcium levels?

Nodes of Ranvier along the length of axon fibers allow for:

Atrial walls are thinner compared to ventricles because:

A chromosome which contains a centromere exactly at its center is called a:

The most abundant polysaccharide in plants, widely used in paper and as a source of dietary fiber for humans, is:

A patient with a genetic disorder undergoes treatment where a normal gene is inserted into their cells. This is called:

Which structure in the neuron is primarily responsible for receiving information from other neurons?

The osmotic gradient of the inner medulla of the kidney is primarily increased by:

Y-linked inheritance refers to which mode of inheritance?

Which of the following statements correctly describes an organelle that is not membrane-bound?

A biological laboratory is developing gene therapy with a modified virus that infects birds only. Which category does this virus belong to?

If a colorblind lady marries a normal man, their children will be:

All of the following properties of water are associated with its capillary action EXCEPT:

The CFTR gene encodes a protein that regulates the transport of:

Which organelle is usually referred to as the 'post office' of the cell and why?

A confirmed COVID patient shows weak specific immunity. Which cellular component is most likely deficient in this patient?

Which of the following organs takes part in T-cell maturation for both the lymphatic and endocrine systems?

The part of the male reproductive system that maintains the optimal temperature for sperm production is the:

Arachidonic acid, which is the precursor molecule for prostaglandins, is:

The binding site for a substrate on an enzyme is the:

This given organelle is involved in the synthesis of oils, phospholipids, and steroids:

Which type of neurons stimulate the muscles to contract in a reflex arc?

Receptors that are located in the retina of the eye are called:

Arthritis is a disease that primarily affects the:

Osmoreceptors that detect the osmotic pressure of blood are primarily located in the:

The bony roof of the oral cavity, which separates it from the nasal cavity, is formed by the:

Chemicals that stimulate the olfactory receptors enter the nasal cavity primarily in the form of a:

Neurosecretory cells are best described as:

Lamarck's theory of evolution (inheritance of acquired characteristics) was rejected experimentally by:

Which of the following characteristics is common among sucrose, lactose, and maltose?

Ribozymes are the only known biocatalysts that are made up of:

The induced-fit model differs from the Lock and Key model because the enzyme in this model:

The digestive secretions from different parts of GIT have the ability to kill microbes present in the food. Which of the following best describes this role?

Components of a reflex arc must contain neurons from:

Which of the following is a potential symptom of chronic renal failure?

Number of sigma bonds in acetylene and ethylene are?

Which of the following has the smallest bond angle?

Which one of the following has the highest ionic character?

Which one has the highest bond energy?

Water is commonly known as a universal solvent because:

Which of the following structural changes in a water molecule leads to the low density of ice?

Reduction of a carboxylic acid by using lithium aluminohydride produces:

In separate vessels of volume 2000 cm³ and 1500 cm³, 6g of hydrogen and 28g of nitrogen are mixed in each vessel at 25°C. Ammonia formed is (N₂ + 3H₂ ⇌ 2NH₃):

The weakest intermolecular force present in a liquid is?

During the reaction of an aldehyde with HCN, the hybridization of the carbon atom of the carbonyl group changes to:

Acetone reacts with water in the presence of a catalyst to produce:

Which one shows a positive test with Fehling's solution?

Oxidation state of Tungsten in Na₂W₄O₁₃·H₂O is:

If the equilibrium expression of a reversible reaction is [C]² / ([A][B]), the balanced chemical equation should be:

Keeping temperature constant, if pressure is increased, the density of a gas will:

Common name of 1,3-benzenediol is:

IUPAC name of chloroform is:

How many sigma and pi bonds are present in maleic anhydride?

Which among the following will react with ammoniacal cuprous chloride?

Addition of three molecules of chlorine into benzene proves that benzene has:

Which of the following is not a crystalline solid?

Number of electrons with l=2 in an atom having atomic number 23 is:

Propyne is allowed to react with hydrochloric acid two times, then the final product is:

A reaction having high activation energy is typically:

Which of the following reagents is used to convert benzene to 2-chloromethylbenzene (o-chlorotoluene)?

Diethyl ether and methyl n-propyl ether are:

In the given reaction CH₃OH → HCOOH, the oxidation state of carbon changes from:

For an endothermic reaction, the enthalpy change is described as:

The structure of four chloroalkanes W, X, Y, and Z are shown: W = (CH₃)₂CHCH(Cl)CH₃, X = CH₂(Cl)CH(CH₃)₂, Y = (CH₃)₂CHCH₂Cl, Z = (CH₃)₂CHC(CH₃)₂Cl. Select the chloroalkane classified as tertiary.

The smallest repeating pattern from which the lattice is built in a crystalline solid is called:

Which of the following reactions will move backward by decreasing pressure?

Which species contains an element with an oxidation number of +4?

As a typical chemical reaction proceeds, the rate of reaction:

The order of a chemical reaction is defined as:

According to Le Chatelier's principle, in Haber's process, the yield of ammonia can be increased by:

A hyperbola isotherm is obtained when a graph is plotted between:

The highest energy for one quantum among the following radiations is:

Which of the following reagents is commonly used to form an alkyne from a vicinal dihalide?

Real gases show more positive deviation as pressure increases because of:

Which statement applies to both ideal and real gases?

In a standard hydrogen electrode, the platinum electrode:

Reaction of 2-Bromobutane with alcoholic KOH predominantly yields:

The relationship between (+) Tartaric acid and (-) Tartaric acid is that they are:

The IUPAC name of the compound CH3COCH3 is:

Orientation of molecules is more important in the following cases EXCEPT:

According to the Kinetic molecular theory, the kinetic energy of molecules increases when they are:

Which of the following compounds has the lower Lattice Energy?

A person moves 600m towards the north then 300m towards the south. Its displacement to distance ratio is:

If the voltage across a resistor is doubled then its resistance will become: (temperature and physical state of the conductor remains constant).

A particle is moving in a uniform circular path whose projection is executing simple harmonic motion on a horizontal diameter. The ratio of instantaneous velocity to the maximum velocity of the projection while passing through the center is:

The option that shows the conditions used by Laplace for correcting the velocity of sound is:

If different colored light beams have the same total energy, which color beam will contain the smallest number of photons?

A patient is injected with a radioactive isotope to trace blood flow and detect circulation issues. The isotope used is more likely to be:

Water flows through a pipe of 0.02 m² with a speed of 3 m/s. The pipe narrows to 0.01 m². The speed in the narrower section is:

In the human circulatory system, turbulent blood flow is most likely to occur when the:

A conducting ring is placed near a current-carrying coil. As the current in the coil increases, the induced current in the ring flows:

In progressive waves, energy is transferred from one point to another through:

A capacitor is connected to an AC source. If the frequency of the AC source is doubled, the current in a purely capacitive circuit will:

When thermal energy is transferred from a hot object to a cold one, the change occurs in the hot object as:

Two spectral lines in the Hydrogen atom spectrum are close together. This likely means:

When two identical waves arrive in phase at a region at the same time, the resultant displacement is equal to:

High slope of an I-V Ohm's law graph means:

The electric potential at a point due to a point charge is 100 J/C. If a test charge of magnitude 1C placed at that point is replaced with a 2C charge, then the physical quantity that will change is:

The waves among the following which require a material medium for their propagation are:

Unequal changes occurring in the velocity of a body in equal intervals of time is called:

What will be the potential difference, if a wire has a resistance of 10 Ohms and a current of 2A flows through it?

According to the particle model of light, a photon is:

The current in a forward biased PN junction is mainly due to:

Stationary waves are formed in a stretched string of 2m length, such that two vibrating loops are formed. The distance between consecutive nodes formed is:

A football is kicked with a speed of 20 m/s at an angle of 30° with the horizontal, the maximum height it attains is:

A high internal resistance battery is not suitable for heavy loads due to:

Two equal charges experience a certain force when placed in vacuum. When the charges are placed in a medium, the force becomes 1/4th. The dielectric constant of the medium is:

If a test charge of magnitude 2C experiences forces of 100N and 200N at two points A and B in an electric field respectively. The ratio of electric fields at A to that of B is:

A body of mass 2 kg moving with velocity 3 m/s collides with a body of mass 1 kg at rest. If they stick together, their common velocity after collision is:

Two balls thrown with equal speeds but at different angles cover equal horizontal distances. If one is thrown at an angle of 40°, then the angle of projection of the other is:

The work done on a body against conservative forces is stored in it in the form of:

If 20 waves pass a point in 2 seconds and with a speed of 5 m/s, then the wavelength of the wave is:

The unit of RC in the case of charging a capacitor is:

A longitudinal wave has a frequency of 500 Hz and a wavelength of 0.6 m, its speed is:

The true statement about angular displacement is:

π radians are equivalent to:

A person moves 600 m towards north then 300 m towards south. Its distance to displacement ratio is:

In a stationary wave, the point that undergoes zero acceleration is:

If the speed of sound is measured at sea level and at the top of a mountain, both at the same temperature. It will be:

The book was written by Rashid Khan. Identify the correct usage of voice.

Identify the example of a complex sentence.

Pick out the sentence which illustrates the use of an infinitive.

What is the effect of using synonyms with different shades of meaning in satire?

People approach the situation differently depending on who they are. The word 'approach' in this sentence means:

The team won the match. _____ they broke the school record.

Identify the sentence with no spelling error:

Travelling in a hot dusty train gives me no pleasure. The underlined part (Travelling in a hot dusty train) of the sentence is:

What does 'I've told you a million times' mean?

What is the primary difference between a hypothesis and a theory?

A is older than B but younger than F. C is younger than B but older than D. Who is the youngest of them?

An outbreak of a corona disease is reported in the city. What should be the first course of action?

Which number comes in the missing place? 1, 3, 7, 15, 31, ____

Every alphabet in the word 'SURGEON' represent a fixed numerical value and the numbers when added, sum up to 99. Based on this, what will the sum of the word 'EORGNSU'?

What comes next? ZX, WU, TR, QO, ____

In a row of students, a student is at the 13th position from the left end and at the 20th position from the right end. How many students are there in the row?

Find the next number: 5, 11, 23, 47, 95, ?

A hiker climbed to a higher altitude, where he felt the air pressure was lower as compared to the lower altitude. What is the likely effect?