During the breakdown of a solution containing carbohydrates, proteins and lipids bycarbohydrase, protease and lipase enzymes, the pH changed from neutral due to the productsformed. Which of the options, A…
Here are four statements about radioactivity:1 A beta particle is an electron that is emitted from the outermost electron shell ofan atom.2 A beta particle is emitted from the nucleus…
Which one of the following would not be formed by cracking the hydrocarbon C12H26? Answer: 10) C A – WrongThis is methane (a type of alkane). This can be produced.…
The graph shows oxygen supply and demand in muscle cells during exercise Which statement correctly describes what is happening in the muscle cells between 0 and 11 minutes? Answer: 9)…
The diagram shows a crane that lifts a load with a mass of 100 kg at a constant speed of 0.4 m/sfor 5 seconds. (g=10 N/kg) Here are 3 statements…
The nth term of a sequence is n/n+1. What is the expression for the difference between the (n+1)th term and the nth term? Answer: 7) B nth term = n/(n+1)…
Look at the equation for making chlorine gas and decide which answer will provide you with the numbers to balance itaKMnO4 + bHCl aKCl + aMnCl 2 + xH2O…
In mice the recessive form of a gene causes the death of the fetus if present in the homozygous state. Mice heterozygous for this gene were crossbred. What percentage of…
In the formula P=2r2tr = 3 x 10-3 t = 2.5 x 10 4Calculate the value of P. Leave your answer in standard form. Answer: 4) D P = 2r²t…
A radioactive isotope X decays into the stable isotope Y with a half-life of 20 s. Which graph correctly shows how the mass (m) of Y present in an initially…