B2 REVISION – CHAPTER 2 – Photosynthesis What is the equation for photosynthesis Where in the plant does it occur? Give five ways plants use glucose. 1. 2. 3. 4. 5. Use a diagram to describe what transpiration is Describe each graph 1. 2. 3.

B2 REVISION – CHAPTER 2 – Photosynthesis Xylem and Phloem Plants transport _____ and minerals in the xylem and sugars in the ______. Xylem tubes are made from long, dead _____. It forms a vessel with a hollow centre also known as a ______. Phloem transports ______ from the ______ to other parts of the plant where it is used immediately or stored for later use. Phloem are made from cells that are elongated, thin walled and unlike xylem are ______. The end walls of phloem have many small pores called the walls are called ____ ______. The leaf Photosynthesis takes place in ________ cells in the leaf. These cells contain ______ which contain chlorophyll a green pigment that traps sunlight. What is photosynthesis? chloroplast You can check a plant is photosynthesising by checking for starch. This is done using ________, if starch is present the leaf will go ______ . The roots What is the role of the roots of the plant?__________________ _________________________ __________________________________________________ The roots of the plant are covered in root hair cells. How are these cells adapted for their job?__________________ ________________________________________________________________ Which plant do we use to check the rate of photosynthesis? _______________ What factors effects the rate of photosynthesis? ____________ ____________ Draw and label a root hair cell below: Which gas is collected? _______ The more bubbles of _______ the _______the rate of photosynthesis What would happen if the light source was moved closer to the plant? __________________________________________

mark scheme Xylem and Phloem Plants transport _water____ and minerals in the xylem and sugars in the xylem______. Xylem tubes are made from long, dead _cells____. It forms a vessel with a hollow centre also known as a lumen______. Phloem transports _sugars from the leaf to other parts of the plant where it is used immediately or stored for later use. Phloem are made from cells that are elongated, thin walled and unlike xylem are _alive. The end walls of phloem have many small pores these walls are called sieve plates The photosynthesis equation: light energy Carbon dioxide + Water Oxygen + Glucose Chlororphyll The leaf Photosynthesis takes place in _palisade cells in the leaf. These cells contain chloroplasts_____ which contain chlorophyll a green pigment that traps sunlight. What is photosynthesis? Process carried out by green plants where co2, water and light energy are used to make glucose and oxygen You can check a plant is photosynthesising by checking for starch. This is done using _iodine_, if starch is present the leaf will go purple/black chloroplast mark scheme

B2 REVISION – CHAPTER 2 – Photosynthesis What is the equation for photosynthesis? Where in the plant does it occur? Any green part but mainly the leaves. Give five ways plants use glucose. 1. Aerobic respiration 2. Making cellulose for cell walls 3. Making proteins 4. Stored as fats and oils 5. Stored as starch Use a diagram to describe what transpiration is Describe each graph Initially as light intensity increases the rate of photosynthesis increases rapidly up until a certain point then levels off. Initially as carbon dioxide levels increase the rate of photosynthesis increases rapidly up until a certain point then levels off. 2. 3. 3. As temperature increases the rate of photosynthesis increases rapidly up until a certain point then falls rapidly.

B2 REVISION – CHAPTER 2 – Photosynthesis Mark scheme What is photosynthesis? The leaf Photosynthesis takes place in _palisade cells in the leaf. These cells contain chloroplasts_____ which contain chlorophyll a green pigment that traps sunlight. Xylem and Phloem Plants transport _water____ and minerals in the xylem and sugars in the xylem______. Xylem tubes are made from long, dead _cells____. It forms a vessel with a hollow centre also known as a lumen______. Phloem transports _sugars from the leaf to other parts of the plant where it is used immediately or stored for later use. Phloem are made from cells that are elongated, thin walled and unlike xylem are _alive. The end walls of phloem have many small pores these walls are called sieve plates Process carried out by green plants where co2, water and light energy are used to make glucose and oxygen chloroplast You can check a plant is photosynthesising by checking for starch. This is done using _iodine_, if starch is present the leaf will go purple/black The roots What is the role of the roots of the plant? Absorb water and mineral ions The roots of the plant are covered in root hair cells. How are these cells adapted for their job? Large surface area to absorb more water and minerals, Draw a root hair cell below: What plant do we use to check the rate of photosynthesis? _pondweed What factors effects the rate of photosynthesis? _temperature CO2 concentration Light levels_ What gas is collected? _Oxygen The more bubbles of Oxygen the greater the rate of photosynthesis What would happen if the light source was moved closer to the plant? Increased photosynthesis therefore more oxygen