Biotechnology

Which condition is needed for penicillin production in a fermenter?

Feb/March 2018

Fermenters need conditions to be tightly controlled. Which condition is paired with the correct reason for controlling it?

Feb/March 2023

Biotechnology includes making biological washing powders with enzymes obtained from bacteria. Fig. 7.1 displays part of a label from a packet of '5 Star Bio' washing powder. The label says: "Contains enzymes", "Wash at 30 ^{\circ}C", "Removes food stains", "Do not wash above 60 ^{\circ}C", "Only small quantities needed", and "Biological Washing Powder".

May/June 2016

Which of the following is a reason for using bacteria in biotechnology?

May/June 2017

Which is one reason bacteria are used in biotechnology?

May/June 2017

What conditions does *Penicillium* require in a fermenter in order to grow?

May/June 2018

Which statement gives the correct reason why bacteria are used in biotechnology?

May/June 2019

Bacteria are helpful in producing products for human use. Which statement explains why they are helpful?

May/June 2019

Scientists in one country are using bacteria to decompose crude oil in deserted oil fields. This generates natural gas, and that gas is then used as a fuel. Why are bacteria beneficial in this biotechnology example?

May/June 2019

Biotechnology is applied in bread-making. Fig. 1.1 outlines some of the stages in bread production. The diagram shows: 'flour, salt and water are mixed in a bowl' → Step 1 mixing → 'organism A and an energy source are added' → Step 2 mixing → 'dough is formed' → Step 3 dough left at 35 ^{\circ}C for 2 hours → 'gas bubbles are produced in the dough' → Step 4 the dough is shaped and left at room temperature → 'the dough is placed in baking tins' → Step 5 dough is baked for 30 minutes at 200 ^{\circ}C → 'bread is produced'.

May/June 2019

Bacteria are useful in ......X...... due to their fast ......Y...... rate and their capacity to produce complex ......Z...... . Which option completes the sentence?

May/June 2021

Scientists needed to find out which of four bacterial varieties, A, B, C or D, would be the most suitable for producing a protein. Each type of bacterium was grown for five days, with the same initial mass used for every one. The scientists then measured the bacterial mass and the mass of protein made per gram of bacteria. The findings are given in the table. Which variety of bacteria ought the scientists select?

May/June 2021

Which process uses a genetically engineered organism?

May/June 2022

Penicillin is manufactured by biotechnology industries.

May/June 2022

Bacteria are valuable in the manufacture of products for people to use. Which statement explains why this is the case?

May/June 2023

Give one reason why bacteria are used in biotechnology.

May/June 2023

Penicillin is produced in a fermenter by culturing organisms. Which kind of organism is used in the production of penicillin?

May/June 2023

How is yeast used in biotechnology?

May/June 2024

What makes bacteria useful in biotechnology?

May/June 2024

The table presents the characteristics of four different kinds of bacteria. Which kind of bacteria would be the most useful for biotechnology?

May/June 2025

The flow chart illustrates some of the steps used to produce biofuel. What do K, L and M represent in the diagram?

May/June 2025

What characteristics make bacteria useful in biotechnology?

May/June 2025

State which type of organism antibiotics are used to kill.

May/June 2025

Which of the following is not a reason why bacteria are used extensively in biotechnology?

Oct/Nov 2016

Penicillin belongs to the group of antibiotics.

Oct/Nov 2016

Biotechnology is used to produce ethanol for biofuels. Which kind of organism may be used to make the ethanol?

Oct/Nov 2018

Bacteria display the following characteristics. 1 the capacity to form complex molecules 2 the ability to reproduce rapidly 3 possess a cell membrane 4 contain cytoplasm Which features make bacteria useful in biotechnology?

Oct/Nov 2018

The diagram illustrates an industrial fermenter that is used to make penicillin. What is one function of the part labelled X?

Oct/Nov 2018

What characteristic of bacteria makes them particularly useful in biotechnology?

Oct/Nov 2019

Which row indicates what is used to produce biofuel, bread and fruit juice?

Oct/Nov 2021

The graph illustrates how the fungus Penicillium grows and how much of the antibiotic penicillin it produces in a fermenter. At which stage of the Penicillium growth curve is the concentration of penicillin greatest?

Oct/Nov 2022

The graph illustrates the amount of penicillin made by the fungus Penicillium in a fermenter. It also plots the concentrations of sugars, ammonium ions and Penicillium. Penicillium uses sugars as its source of food and requires ammonium ions. What can the graph tell you about the conditions required for penicillin production?

Oct/Nov 2022

Which product is produced with an enzyme rather than with bacteria or fungi?

Oct/Nov 2023

State two cell structures that are found in both animal and bacterial cells.

Oct/Nov 2023

Penicillin is made in a fermenter by cultivating the fungus Penicillium. The graph illustrates how the mass of living Penicillium fungus and the concentration of penicillin vary with time. At what point is it best to harvest the penicillin?

Oct/Nov 2024

Penicillin may be made in fermenters.

Oct/Nov 2024

Yoghurt is made by adding the bacterium Lactobacillus bulgaricus to milk.

Oct/Nov 2025