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Biology Review

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Biology Review

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25 Questions

1. What happens to the active site at very high temperatures?

Contains cell sap - a weak solution of sugar and saltsActive transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsAt very high temperatures the active site breaks up and the enzyme is denatured.

2. What is active transport?

Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsAt very high temperatures the active site breaks up and the enzyme is denatured.Contains cell sap - a weak solution of sugar and salts

3. How would you use a quadrat?

Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsContains cell sap - a weak solution of sugar and saltsAt very high temperatures the active site breaks up and the enzyme is denatured.

4. What does the large vacuole do?

Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.Contains cell sap - a weak solution of sugar and salts- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsAt very high temperatures the active site breaks up and the enzyme is denatured.

5. How would someone measure the rate of a reaction by using amylase as the enzyme and starch substrate? - amylase catalyses the breakdown of starch. So you time how long it takes for the starch to dissappear - to do this - regularly take a drop of the amylase and starch mixture - and put it into a drop of iodine solution on a spotting tile. Record the colour change - it will true blue-black if starch is present. Note the time when the iodine solution no longer turns blue-black - the starch has then been broken down by the amylase. You can use times to compare reaction rates under different conditions.

At very high temperatures the active site breaks up and the enzyme is denatured.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsWhat are the variables you may change during an enzyme controlled reaction? - changing the temperature = put test tubes into different temperature water baths - effect of ph = use a range of different ph buffers - effect of substrate concentration = vary the substance concentrations of the starch solutionsActive transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.

6. How does the structure of the gut help digestion?

- theres longitudional muscles down the length of the gut and circular muscles running in circles around the gut - the muscles squeeze the food along. This squeezing action is called peristalsis - waves of circular muscle contraction push the food along the gut - waves of longitudional muscle contractions run slightly ahead t help keep the food in a ball- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsActive transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.At very high temperatures the active site breaks up and the enzyme is denatured.

7. What might affect the rate of photosynthesis (limiting factors)?

- light intensity (night = no light) - concentration of co2 - temperature (winter = cold - in an experiment you could use different temperature water baths)At very high temperatures the active site breaks up and the enzyme is denatured.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsActive transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.

8. What is magnification?

How much bigger the image is that the specimen- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsAt very high temperatures the active site breaks up and the enzyme is denatured.Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.

9. What happens in the lungs to haemoglobin?

Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.At very high temperatures the active site breaks up and the enzyme is denatured.- in the lungs - haemoglobin combines with oxygen to become oxyhaemoglobin. In body tissues the reverse happens to release oxygen to the cells.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your results

10. What are parts of a plant cell?

- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsRigid cell wall - Large vacuole - Chloroplasts - (nucleus - cytoplasm - cell membrane and mitochondria)Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.At very high temperatures the active site breaks up and the enzyme is denatured.

11. What do carbohydrases do?

Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsDigest carbohydratesAt very high temperatures the active site breaks up and the enzyme is denatured.

12. How could you investigate the effect of exercise on breathing and heart rate?

At very high temperatures the active site breaks up and the enzyme is denatured.- you can measure breathing rate by counting breaths and heart rate by taking a pulse. - you could exercise for 5 minutes doing three different exercises of different intensities. After each exercise take your pulse and heart rate. - your pulse rate will increase the more intense the exercise is as your body needs to get more oxygen to the muscles ad take away the carbon dioxide.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsActive transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.

13. What are the disadvantages of cloning and some issues surrounding cloning?

- any genetic defect in the parent will be passed on to the offspring - clones mammals may suffer more health problems than usual - which may cause them to die early - it is more difficult to clone a mammal than a plant; it may take a few attempts - cloning mammals leads to a reduced gene pool (fewer alleles in the population). This may mean if there is a new disease all the species could become extinct- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsActive transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.At very high temperatures the active site breaks up and the enzyme is denatured.

14. What are the features of a bacteria cell?

15. Why are gametes haploid?

Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.So that when two gametes combine at fertillisation - the resulting cell (zygote) has the right number of chromosomes. Zygotes are diploid - they have two copies of each chromosome.At very high temperatures the active site breaks up and the enzyme is denatured.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your results

16. What can higher temperatures cause the active site to do?

- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsHigher temperatures cause the active site to change shape - so it cant hold the substrate as tightly and the reaction goes more slowly.Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.At very high temperatures the active site breaks up and the enzyme is denatured.

17. What is dna?

- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsAt very high temperatures the active site breaks up and the enzyme is denatured.The complex chemical that carries genetic information. Dna is found in chromosomes which are found in the nucleus of most cells.Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.

18. What is the circulatory system?

Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.The circulatory system is an organ system that consists of the heart - the blood vessels and the blood. It's function is to transport materials around the body.At very high temperatures the active site breaks up and the enzyme is denatured.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your results

19. What is meant by the 'lock and key' hypothesis for enzymes?

- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsActive transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.At very high temperatures the active site breaks up and the enzyme is denatured.Each enzyme has an active site. Some substrates may or may not fit the active site. If the substrate matches the shape of the active site - the substrate molecules hold them close together so bonds can form between them and make a product. If the product molecule doesn't fit the active site - it is released from the enzyme. Enzymes usually only join with one substrate as they have a high specificity for their substrates.

20. What do which blood cells do? - white blood cells defend against disease

At very high temperatures the active site breaks up and the enzyme is denatured.Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your results- they produce antibodies to fight microorganisms as well as antitoxins to neutralise any toxins produced by microorganisms. -

21. Why is the fossil record not complete?

- fossils do not always form (fossils only form if the ground is suitable e.g not too acidic) - soft tissue decays (hard tissue e.g bones may fossilise but soft tissue e.g muscles usually decay too quick - many fossils are yet to be found (we only find fossils whee we can dig them up - many are deep underground)Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsAt very high temperatures the active site breaks up and the enzyme is denatured.

22. What does the digestive system do?

Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsAt very high temperatures the active site breaks up and the enzyme is denatured.The digestive enzymes break down the big molecules into the smaller ones: - carbohydrates e.g amylase digest starch to sugars - proteases e.g pepsin digest proteins to amino acids - lipase digests fat to fatty acids and glycerol

23. What are the parts of an animal (and plant) cell?

Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.At very high temperatures the active site breaks up and the enzyme is denatured.- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsNucleus - Cytoplasm - Cell membrane - Mitochondria

24. What is the human genome project?

- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your resultsScientists in 18 different countries collaborated to decode the human genome. This is the order of bases on all the human chromosomes. The project was completed quickly because so many scientists worked on it at the same time. The work was published in 2003.At very high temperatures the active site breaks up and the enzyme is denatured.Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.

25. How do root hairs take in minerals? - using active transport. Define active transport

Active transport uses energy from respiration to help the plant pull minerals into the root hair against the concentration gradient. This is essential for growth. Minerals cannot enter the root cells from soil water by diffusion as the concentration is too high.At very high temperatures the active site breaks up and the enzyme is denatured.- root hairs also absorb minerals from the soil - the concentration of minerals in soil is low. It is usually higher in the root hair cell than in the soil around it- place each quadrat randomly in a sample area - count the number of organisms - or estimate the are covered by the organism in each quadrat. - repeat in different areas - calculate an average measurement from all of your results

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25 Questions

❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | What Should We Know? Privacy | Terms |

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All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.

About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | What Should We Know?
Privacy | Terms |

Without work one finishes nothing. - Ralph Waldo Emerson
© 2026 Fatskills.com