STPM Biology 2017 Term 1 MCQ

Which statement explains why fructose is soluble in water while oleic acid is insoluble in water?

• A

• B

• C

• D

Which are true of this lipid molecule?

I It is a saturated fat.

II It is a liquid at room temperature.

lII It can be sourced from cod liver oil.

IV It is the final product of fat digestion.

• I and II

• I and IV

• II and III

• III and IV

Cytosine makes up 22% of the nucleotides in a sample of DNA. What is the percentage of

adenine in the sample?

• 22

• 28

• 44

• 56

In what aspect does the human DNA and tiger DNA differ?

• The human DNA and tiger DNA have different types of nucleotide.

• The human DNA and tiger DNA have different types of pentose sugar.

• The human DNA and tiger DNA have different structures of DNA molecule.

• The human DNA and tiger DNA have different purine base and pyrimidine base ratio.

Two types of specialised epithelial tissues, P and Q, with glandular functions are shown in the diagrams.

• I and II

• I and III

• II and IV

• III and IV

A pear's flesh has a hard and gritty texture yet juicy. Which cells give these characteristics?

• Parenchyma and collenchyma

• Parenchyma and sclereids

• Collenchyma and fibres

• Fibres and sclereids

Which comparisons between the prokaryotic and eukaryotic cells are true?

• I and III

• I and IV

• II and III

• II and IV

Predict.

• A

• B

• C

• D

Which factor will give the results shown by curve S?

• Higher pH

• Lower temperature

• Non-competitive inhibitor

• An increased concentration of substrate

The presence of a competitive inhibitor in an enzymatic reaction will result in ______.

• an increase in K_M

• a decrease in V_max

• the denaturation of enzyme

• a change in the conformation of the active site