Sperm whales have the largest brains on the planet, although both humans and dolphins have larger brains

relative to their body size. But why should relative brain size be important? If one thinks of a brain as a computer, there is no obvious reason why it must be sized in proportion to the body it lives in. Why for example should a whale need an especially large brain, when a hummingbird – which has complex tasks to perform – manages with a tiny one?

Which one of the following is a conclusion that is supported by the above passage?

Children are being encouraged to take up gardening through special events at shows and activities in schools. It is hoped that an interest in gardening, and particularly growing one’s own food, will make children more interested in learning about their food and they will therefore be deterred from eating junk food. The initiative should be supported and spread to more schools as quickly as possible.

Which one of the following, if true, would most weaken the above argumen?

In the 1920s and 1930s there were successes for extremist parties in elections across Europe. Several of these parties formed governments and were directly involved in starting the Second World War. In recent elections extremist parties were particularly successful at the expense of the more traditional parties. It is possible that this dangerous situation will get worse. Our schools must teach children about the link between extremist politics and war in order to reduce the likelihood of future wars. Which one of the following is an underlying assumption of the above argument?

Out of 2,319 employees of a company, 1,299 speak Spanish and 1,122 speak French; 517 speak neither. How many speak both?

A tank has three inlet pipes. One, by itself, can fill the tank in one hour; another, by itself, can fill the tank in one hour and twenty minutes ; a third, by itself, can fill the tank in fifty minutes alone. If all three are on, then, to the nearest tenth of a minute, how long does it take to fill the tank?

Artificial Intelligence (AI) has become increasingly integrated into various facets of daily life, revolutionizing industries such as healthcare, finance, and transportation. AI systems, powered by machine learning algorithms, analyze vast amounts of data to make predictions, automate tasks, and provide personalized recommendations. For instance, in healthcare, AI assists in diagnosing diseases from medical images and suggests tailored treatment plans. However, concerns regarding AI ethics and biases persist, as these systems can inadvertently reflect human prejudices present in the data they are trained on. It is crucial to develop AI responsibly, ensuring fairness, transparency, and accountability in its deployment to harness its potential benefits without perpetuating societal inequalities.
Multiple-Choice Questions:
What powers Artificial Intelligence (AI) systems mentioned in the passage?

How does AI contribute to the field of healthcare according to the passage?

From what language doesMaltese originate?

Who is Greta Thunberg?

Which of the following is not a correct description of a light microscope or an electron microscope?

Which set of observations would indicate that a student is observing a eukaryotic cell?

The sentence below describes a cellular process and an associated eukaryotic cellular structure.

Cells which have a high rate of …I… will have many …II….

Select the terms that best fit the gaps in this sentence.

A student places an animal cell and a plant cell into distilled water and notes down the following observations.

Animal cell: swells and then bursts

Plant cell: swells

What is the reason for this difference?

Starch and cellulose are the compounds made up of many units of

Which one of the following is the sweetest sugar

Final product of starch digestion is

Cellulose are polymers of

Sucrose, a common table sugar, is composed of

The chemical formula of starch is

Proteins consist of

Which of the following is conjugated protein

Which of the following is the simplest amino acid

Lipids are insoluble in water, because lipids molecules are

Which of the following is a characteristic of lipids?

Choose 1 answer :

How are triglycerides formed?

Choose 1 answer:

The laboratory technique of Polymerase Chain Reaction (PCR) takes advantage of the ability of polymerase enzymes to copy pieces of genetic material quickly and accurately. Which of the following are necessary for successfully conducting PCR in a forensic examination at a crime scene?

I )An active sample of human DNA or RNA polymerase.

II)Buffer solution

III)A sample of target DNA or RN

IV)Free nucleotides

V)Primer sequences

 Dabigatran is a drug that prevents coagulation of blood by binding to the protein thrombin. Binding of dabigatran prevents thrombin from binding to fibrinogen in the same region.

If label 1 represents fibrinogen, what do labels 2 and 3 represent?

 Which of the following statements about transcription are true?

I)DNA remains in the nucleus because it is too large to fit through the pores in the nuclear envelope.

II)Transcription makes a copy of the sense strand of DNA.

III)Transcription converts a sequence of nucleotides into a sequence of amino acids.

IV)RNA polymerase forms covalent bonds between the RNA nucleotides.

 Which enzyme is required by geneticists to produce sections of DNA from single-stranded RNA for the production of genetically modified organisms?

Membrane-bound sacs containing products of metabolism are produced by the endoplasmic reticulum.
Where are these products used?

Which of the following is a function of the mitochondria in a eukaryotic cell?

 If the number of chromosomes paires are 8 in metaphase-I, what shall be the number of chromosomes in daughter cells after meiosis -1 and meiosis – II respectively?

For given unbalanced reaction below, how many CO in Kg is required for producing 1 mole of Fe? 

what is the percent composition by mass of Oxygen in a molecule of glucose ( C₆H₁₂O₆ )?

how many grams of oxygen exist in 1.5 mole of CuSO₄.5H₂O.

(Cu=64g/mol- S=32 g/mol – O= 16g/mol –H=1g/mol )

When 32mg of ethane is burned (C₂H₆ + O₂ →  CO₂ +  H₂O )  with excess oxygen, how many grams of H2O are produced?

What is the limiting reagent in The reaction of 40.0 g of CH4 and 36g of H₂O how many mols of hydrogen can be produced from this reaction?

CH₄ + H₂O → CO + 3H₂

(C=12 g/mol , H=1g/mol ,O= 16g/mol)

Balance the shown below reaction, and classify X ,Y and Z?

N₂O₄ → X NO₂

KNO₃ →Z KNO₂+ O₂

C₂H₅OH +O₂→Y CO₂+H₂O

The composition by mass of a hydrocarbon is 15.5% hydrogen and 84.5%carbon .Deduce the empirical formula of this hydrocarbon. (C=12 g/mol , H=1g/mol)

A compound has the empirical formula C₂H₄O and its relative molecular mass is 88 what is the molecular formula of this compound? (C=12 g/mol , H=1g/mol ,O= 16g/mol)

 In a balanced ionic equation:

1) the number of positive and negative charges on each side of the arrow are the same.

2)the numbers of atoms on each side of the arrow are the same.

3)There are no spectator ions in a balanced ionic equation

Which of the following statement is true:

1) sugar is a heterogeneous mixture , glucose is a compound

2) Glucose is a compound

3) Sugar solution is a homogeneous mixture.

 Choose the correct answer?

1) the correct formula for ammonium hydrogen sulfate

2) the correct formula for calcium oxide

3) the correct formula for aluminum sulfate

Name each of the following compounds:

1) Ca(NO₃)₂

2) CuO

3) Na₂CO₃

From the reaction of 20 grams of hydrogen gas with excess oxygen, 160 grams of water are produced. Calculate the percentage yield of the reaction?

2H₂ +O₂→2H₂O

which of the following contains the greater number of atoms?

Which statement is not correct?

A right-angled triangle has legs of length 6 cm and 8 cm.What is the length of the hypotenuse?

Two standard six-sided dice numbered 1 to 6 are rolled. What is the probability that the product of the two numbers obtained is the square of a prime?

Two ice skaters, mass 50 kg and 60 kg, push off from rest and move in opposite directions. If the lighter skater moves at 2.0 m/s, what is the velocity of the heavier skater?

A sealed container of 2 mol of ideal gas at 300 K and 2 atm is heated to 600 K. If volume doubles, what is the final pressure?

In a circuit, two resistors of 4 Ω and 6 Ω are connected in series, powered by a 12 V battery. What is the power dissipated by the 6 Ω resistor?

wire of resistance 5 Ω carries a current of 3 A for 2 minutes. How much heat energy is generated?

A radioactive isotope has a half-life of 10 minutes. What fraction of the original nuclei remains after 30 minutes?

A straight wire of length 0.5 m carrying a current of 4 A is placed in a uniform magnetic field of 0.2 T perpendicular to the wire. What is the magnetic force on the wire?