Read the given statements and select the option that correctly identifies them as true (T) and false (F) ones.
(i) Granum is the site of dark reaction during photosynthesis, whereas stroma is the site of light reaction during photosynthesis.
(ii) Lysosomes are formed by the joint activity of endoplasmic reticulum and Golgi complex.
(iii) Each 70S ribosome consists of a large 508 subunit and a small 30S subunit.
(iv)(iv) The chromosome in which the centromere is near the end and consequently its one arm is very short and the other arm very long, is called acrocentric chromosome.

Options

A. (i)-T,(ii)-T , (iii)-F, (iv)-F
B. (i)-F , (ii)-T, (iii)-T , (iv)-T
C. (i)-F , (ii)-F , (iii)-F , (iv)-T
D. (i)-T , (ii)-F , (iii)-T, (iv)-F

Answer

To solve the question, we need to evaluate each statement and determine whether it is true (T) or false (F). Let's go through each statement step by step.

### Step-by-Step Solution:

1. **Statement (i)**: "Granum is the site of dark reaction during photosynthesis, whereas stroma is the site of light reaction during photosynthesis."
- **Evaluation**: This statement is incorrect. The granum (plural: grana) is actually the site of the light reactions (where chlorophyll absorbs sunlight), while the stroma is where the dark reactions (Calvin cycle) occur.
- **Conclusion**: This statement is **False (F)**.

2. **Statement (ii)**: "Lysosomes are formed by the joint activity of endoplasmic reticulum and Golgi complex."
- **Evaluation**: This statement is correct. Lysosomes are indeed formed from the Golgi apparatus and are involved in the breakdown of waste materials and cellular debris.
- **Conclusion**: This statement is **True (T)**.

3. **Statement (iii)**: "Each 70S ribosome consists of a large 50S subunit and a small 30S subunit."
- **Evaluation**: This statement is correct. The 70S ribosome in prokaryotes is made up of a large 50S subunit and a small 30S subunit.
- **Conclusion**: This statement is **True (T)**.

4. **Statement (iv)**: "The chromosome in which the centromere is near the end and consequently its one arm is very short and the other arm very long, is called acrocentric chromosome."
- **Evaluation**: This statement is correct. An acrocentric chromosome has the centromere located near one end, resulting in one short arm and one long arm.
- **Conclusion**: This statement is **True (T)**.

### Final Summary:
- (i) F
- (ii) T
- (iii) T
- (iv) T

The correct answer option is **B**: first false, second true, third true, and fourth true.