Question

Albuminous cells occur in
(a)Xylem
(b)Phloem
(c)Sclerenchyma
(d)Collenchyma

Answer 1

Albuminous cells are specialized parenchyma cells, associated with sieve cells in gymnosperms. Sieve cells have a close association with Albuminous cells which help in transporting organic material.

Complete step-by-step answer:
Albuminous are specialized parenchyma cells found in association with Sieve cells present in the phloem of gymnosperm wood. These cells contain protein albumin.
They are analogous to companion cells found in Angiosperms.

Additional Information: Phloem is the vascular tissue responsible for the transport of food in the form of sugars from source tissues (i.e. photosynthetic cells) to sink tissues (i.e. non-photosynthetic cells).
Certain other molecules like mRNAs and proteins are also transported throughout the plant body via the phloem.
Phloem tissue has conducting cells, called sieve elements, Phloem parenchyma, that includes both specialized companion cells found in angiosperms or albuminous cells found in gymnosperms and unspecialized supportive cells, such as fibers and sclereids. It also contains Phloem Sclerenchyma.
Sieve cells are long, conducting cells in gymnosperm phloem. Albuminous cells have long, unspecialized areas with overlapping ends with the ends of other sieve cells and contain stored food and nutrients in order to nourish the tissues. They enable sieve cells to be connected to parenchyma which is functional thus helping in stabilizing the tissue and transporting nutrients.
So, the answer is ‘Phloem’

Note: Companion cells are analogous to albuminous cells in angiosperms. They are more specialized as compared to albuminous cells and support the sieve tube elements in angiosperms.
The sieve tube in angiosperms is more specialized with a sieve plate and complete absence of a nucleus. In that case, companion cells are the complete support unlike albuminous cells as sieve cells have nucleus present in them.