Glycosidic linkage present between adjacent glucose units of starch or glycogen is genetally

Options

A. `beta1to4`
B. `alpha 1rarr 4`
C. `alpha2to1`
D. `beta2to6`

Answer

To determine the type of glycosidic linkage present between adjacent glucose units of starch or glycogen, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Starch and Glycogen**:
- Starch and glycogen are polysaccharides made up of glucose units.
- Starch is primarily found in plants, while glycogen is found in animals.

2. **Identify the Glycosidic Linkage**:
- Glycosidic linkages are the bonds formed between monosaccharides (like glucose) during the formation of polysaccharides.
- The specific type of glycosidic linkage can vary based on the orientation of the hydroxyl (-OH) groups on the glucose molecules.

3. **Examine the Options**:
- The options provided are:
- a) Beta 1,4
- b) Alpha 1,4
- c) Alpha 2,1
- d) Beta 2,6

4. **Determine the Correct Linkage**:
- In starch (specifically amylose) and glycogen, the glucose units are linked primarily by **alpha-1,4 glycosidic linkages**.
- This means that the hydroxyl group on the first carbon of one glucose unit (alpha position) is linked to the fourth carbon of the adjacent glucose unit.

5. **Conclusion**:
- Therefore, the correct answer is **alpha-1,4 linkage**.

### Final Answer:
The glycosidic linkage present between adjacent glucose units of starch or glycogen is generally **alpha-1,4**.

---