Photosynthesis in Autotrophs

Q.

Draw a neat and well-labeled diagram of a cross-section of a leaf.

Q.

Draw a well-labelled diagram of the internal structure of the leaf.

Q. In the set up shown above, the role of potassium hydroxide and sodium bicarbonate is to ___ and ___ respectively.

1. provide necessary nutrients, absorb carbon-dioxide
2. provide carbon-dioxide, absorb carbon-dioxide
3. absorb carbon-dioxide, provide oxygen
4. absorb heat from the plant, provide carbon dioxide

Q. Each stoma is guarded by two kidney shaped cells called

1. guard cells
2. palisade cells
3. mesophyll cells
4. parenchyma cells

Q.

In which form glucose is stored in plants?

Q.

What are the 4 layers of a leaf?

Q. Plants synthesise their food in the form of glucose and store it in the form of

1. sucrose
2. fats
3. starch
4. glycogen

Q.

The tiny pores through which leaves take in carbon dioxide from the atmosphere are known as ___ .

Q.

Choose the reasons to justify that plants are called the lungs of the Earth.

1. The increase in plant cover on the Earth increases air pollution

2. They absorb oxygen from the atmosphere and release carbon dioxide

3. They absorb carbon dioxide from the atmosphere and release oxygen

4. The decrease in plant cover on the Earth decreases air pollution

Q. The tiny pores through which leaves take in carbon dioxide from the atmosphere are known as

1. spiracles
2. stomata
3. nostrils
4. tentacles

Q.

On a sample of rice, iodine test was performed in two ways and the result was recorded as given below.

$\begin{array}{cc}\text{PROCEDURE}& \text{Result}\\ 1.\text{Rice + lodine}& \text{Blue black colour}\\ 2.\text{Rice + Saliva (3-4 minutes) + lodine}& \text{Blue black colour}\end{array}$

Select the incorrect option from the following:

1. Result 1 is correct.

2. Result 2 is correct

3. Procedure 2 is correct

4. Procedure 1 is correct

Q. A few drops of iodine solution were added to rice water. The solution turned blue black in colour which indiates that rice water contains

1. starch
2. fats
3. complex proteins
4. simple proteins

Q.

Each stoma has two bean-shaped cells called

1. palisade.
   

2. guard cells.
   

3. epidermis.
   

4. chloroplast.

Q.

The loss of water through the cuticles present in the leaf is known as ___.

1. Stomatal transpiration

2. Cuticular transpiration

3. Areolar transpiration

4. None of the above

Q.

Name the simple sugar found in plant tissues which is also a product of photosynthesis.

1. Cellulose

2. Starch

3. Glucose

4. Sucrose

Q.

Carbohydrates in animals are stored in the form of

1. Glycogen

2. Starch

3. Glucose

4. Maltose

Q. ________ are called as food factories of plants.

1. roots

2. fruits

3. leaves

4. flowers

Q. Photosynthesis occurs with the help of a molecule present in chloroplasts called .

1. Haemoglobin
2. Chlorophyll
3. Melanin
4. Carbohydrate

Q. Match the parts of the cross section of leaf depicted in the image with the descriptions given.

a. Stomata
b. Mesophyll
c. Lower epidermis
d. Upper epidermis
e. Cuticle

1. i - e, ii - d, iii - b, iv - c, v - a
2. i - a, ii - d, iii - b, iv - c, v - e
3. i - a, ii - b, iii - d, iv - c, v - e
4. i - a, ii - b, iii - d, iv - e, v - c

Q.

Which of the following equations is the summary of photosynthesis?

1. $6{\mathrm{CO}}_2+12{\mathrm{H}}_2\to {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6+6{\mathrm{O}}_2+6{\mathrm{H}}_2\mathrm{O}$

2. $6{\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}+\mathrm{Sunlight}\to {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6+{\mathrm{O}}_2+6{\mathrm{H}}_2\mathrm{O}$

3. $6{\mathrm{CO}}_2+12{\mathrm{H}}_2\mathrm{O}+\mathrm{Chlorophyll}+\mathrm{Sunlight}\to {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6+6{\mathrm{O}}_2+6{\mathrm{H}}_2\mathrm{O}$

4. $6{\mathrm{CO}}_2+12{\mathrm{H}}_2\mathrm{O}+\mathrm{Chlorophyll}+\mathrm{Sunlight}\to {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6+6{\mathrm{CO}}_2+6{\mathrm{H}}_2\mathrm{O}$

Q.

Give one use of the following:-stomata

Q. Refer to the setup and select the correct statements.

1. Aim of this experiment is to prove that oxygen is released during photosynthesis.
2. Aim of this experiment is to prove that CO₂ is released during photosynthesis.
3. Hydrilla performs respiration and releases carbon dioxide.
4. Hydrilla performs photosynthesis and releases oxygen.

Q.

Name the simple sugar found in plant tissues which is also a product of photosynthesis.

1. Cellulose

2. Starch

3. Glucose

4. Sucrose

Q. Glucose is the product of photosynthesis.

1. False
2. True

Q. when iodeneis applied to any food item which has starch why does the colorof that area of food changes to blue or black.iodene is also blue or black in color so how can it show the presence of starch in food ??​

Q. Complete the photosynthesis reaction:
+ Water $\stackrel{Sunlight,Cholorophyll}{\to }$ + Oxygen

1. Carbon dioxide
2. Hydrogen
3. Glucose
4. Starch

Q.

Which pigment is necessary in order for plants to convert carbon dioxide and water, in the presence of sunlight, into oxygen and glucose?

1. Chlorophyll

2. Haemoglobin

3. Melanin

4. Carotenoids

Q. Chloroplasts absorb energy from the sun and use it to power the food making process.

1. False
2. True

Q.

why is stomata absent in underwater plants?

Q. The gas collected in the test tube in the experiment shown below is.

1. carbon dioxide
2. nitrogen
3. oxygen