Experiments_MCQ_Advance Level

Experiments - Advance

Dear Readers,

Botany, also called plant science(s), plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field.

Q1.  Which of the following isotope of carbon was used by Calvin to trace the path of carbon in photosynthesis or The isotope of carbon used extensively for studies in photosynthesis is

•  C¹³
•  C¹⁴
•  C¹⁵
•  C¹⁶

C₁₄

Q2.  If half of the leaves of a plant are removed, the rate of photosynthesis would be

•  More and the photosynthetic yield is also more
•  More but the photosynthetic yield is less
•  Less and the photosynthetic yield is also less
•  Less but the photosynthetic yield is more

More but the photosynthetic yield is less

Q3.  Engelmann's experiment with Spirogyra demonstrated that

•  The full spectrum of sunlight is needed for photosynthesis
•  Only red wavelengths are effective in causing photosynthesis
•  Only blue wavelengths are effective
•  Both blue and red wavelengths are effective

Both blue and red wavelengths are effective

Q4.  Algae float in the water during day time and sink during night time because

•   They become buoyant due to consumption of food materials in respiration
•   They loose weight at night
•  They come up to enjoy sunshine
•  They become buoyant in light due to accumulation of oxygen bubbles released in photosynthesis

They become buoyant in light due to accumulation of oxygen bubbles released in photosynthesis

Q5. If water supply to the plant is extremely meagre to as to cause wilting of leaves, the rate of photosynthesis may

•  Increase
•  Decrease
•  First increase than decrease
•  First decrease than increase

Decrease

Q6.  A plant is kept in 300 ppm CO₂ concentration, what will happen to it

•  Plant will die soon
•   Plant will grow but will not die
•   Plant will show normal photosynthesis
•  Respiration will be greatly decreased

Plant will show normal photosynthesis

Q7.  The experimental material that has largely been responsible for making rapid advances in research on photosynthesis is

•  Chlamydomonas
•   Spinach leaf
•  Chlorella
•  Hydrilla

Chlorella

Q8.  The starch is insoluble in water even than it is stored in potato in more quantity

•  By microbes
•   Because it is manufactured in tuber
•   Because plants use it as food
•   Because first it come to tuber as sugar solution then it is stored as starch

Because first it come to tuber as sugar solution then it is stored as starch

Q9.  Much of the starch is deposited in Banana fruit as it matures. Which of the following explains how the starch gets there

•  Starch solution passes through cells from phloem to fruit
•  Starch grains pass through cells from xylem to fruit
•  Starch solution passes through companion cells to fruit
•   A sugar solution passes through phloem cells to the fruit where it is changed to starch

A sugar solution passes through phloem cells to the fruit where it is changed to starch

Q10.  Emerson found photosynthesis to increase with light flashes. Blackmann observed increase in photosynthesis with the increase in light and CO2 till temperature became limiting. What of the following is true in light of above observation

•   Light intensity is temperature dependent
•   Light harvesting occurs only in the presence of CO₂
•   Photosynthesis has two phases, light and dark
•   One factor is limiting photosynthesis at one time

Photosynthesis has two phases, light and dark