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Life Processes

Description: classification, characteristics, etc
Number of Questions: 17
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Tags: botany Structural Organisation in Animals and Plants Biology
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Which of the following type of algae exists in filamentous form?

  1. Volvox

  2. Ulothrix

  3. Chlamydomonas

  4. Both 1 and 2

  5. None of these


Correct Option: B
Explanation:

Ulothrix and Spirogyra exist in filamentous form.

Leaf like photosynthetic organ in brown algae is termed as

  1. stipe

  2. holdfast

  3. frond

  4. leafoid

  5. pyrenoid


Correct Option: C
Explanation:

Leaf like photosynthetic organ in brown algae is known as frond.

Which of the following molecules is the stored food product of brown algae?

  1. Starch

  2. Algin

  3. Floridean starch

  4. Laminarin

  5. Cellulose


Correct Option: D
Explanation:

Mannitol and laminarin are stored food products in brown algae.

Which of the following statements is incorrect?

  1. Many algae show haplontic life cycle.

  2. In gymnosperms, the male and the female gametophytes do not have an independent free-living existence.

  3. In pteridophytes, the main plant body is a sporophyte.

  4. In bryophytes, the dominant phase in the life cycle is the gametophyte.

  5. None of these


Correct Option: E
Explanation:

All the above statements are correct.

Flagella are absent in which of the following type of algae?

  1. Chlorophyceae

  2. Rhodophyceae

  3. Phaeophyceae

  4. Blue-green algae

  5. None of the above


Correct Option: B
Explanation:

Flagella are absent in red algae.

Which of the following types of placentation is seen in sunflower and marigold?

  1. Marginal

  2. Free central

  3. Basal

  4. Parietal

  5. Axile


Correct Option: C
Explanation:

In basal placentation, the placenta develops at the base of ovary and a single ovule is attached to it, as in sunflower and marigold.

Radicle in the monocotyledonous seed that is covered with which of the following structures?

  1. Aleurone layer

  2. Scutellum

  3. Coleorhiza

  4. Coleoptile

  5. Tegmen


Correct Option: C
Explanation:

Radicle is enclosed in a sheath called coleorhiza

Racemose type of inflorescence and bisexual/zygomorphic type of flower is seen in which of the following families?

  1. Solanaceae

  2. Fabaceae

  3. Liliaceae

  4. 1 and 3

  5. None of the above


Correct Option: B
Explanation:

Fabaceae; Inflorescence is racemose. Flower is bisexual, zygomorphic.

Which of the following organelles is the major site for synthesis of lipid?

  1. Golgi apparatus

  2. Mitochondria

  3. RER

  4. SER

  5. Chloroplast


Correct Option: D
Explanation:

SER is the major site for synthesis of lipid.

The xylem and phloem are situated at the same radius of vascular bundles in which of the following type of arrangements?

  1. Open

  2. Closed

  3. Radial

  4. Conjoint

  5. None of the above


Correct Option: D
Explanation:

In conjoint type of vascular bundles, the xylem and phloem are situated at the same radius of vascular bundles. Such vascular bundles are common in stems and leaves.

The peripheral region of the secondary xylem that is lighter in colour is known as __________.

  1. early wood

  2. late wood

  3. sap wood

  4. heart wood

  5. none of the above


Correct Option: C
Explanation:

The peripheral region of the secondary xylem, is lighter in colour and is known as the sapwood. It is involved in the conduction of water and minerals from root to leaf.

Which of the following is the most abundant protein in the whole of the biosphere?

  1. Collagen

  2. Keratin

  3. Ribulose bisphosphate Carboxylase-Oxygenase

  4. Glucose-6-phosphatase

  5. Inulin


Correct Option: C
Explanation:

Ribulose bisphosphate Carboxylase-Oxygenase (RuBisCO) is the most abundant protein in the whole of the biosphere.

Which of the following is a site for active ribosomal RNA synthesis?

  1. Chromatin

  2. Nucleolus

  3. Ribosome

  4. Kinetochore

  5. Nuclear membrane


Correct Option: B
Explanation:

The content of nucleolus is continuous with the rest of the nucleoplasm as it is not a membrane bound structure. It is a site for active ribosomal RNA synthesis.

Nucleolus, golgi complex and ER reform in which of the following phases of the cell cycle?

  1. Prophase

  2. Metaphase

  3. Anaphase

  4. Telophase

  5. Interphase


Correct Option: D
Explanation:

Nuclear envelope assembles around the chromosome clusters and nucleolus, golgi complex and ER reform in telophase.

Oils and fats are stored in which of the following type of plastids?

  1. Amyloplasts

  2. Elaioplasts

  3. Aleuroplasts

  4. Thylakoids

  5. Chromoplasts


Correct Option: B
Explanation:

Elaioplasts store oils and fats.

Fucus, an alga has which of the following types of life cycle?

  1. Haplontic

  2. Haplo-diplontic

  3. Diplontic

  4. Haplo-haplontic

  5. Diplo-diplontic


Correct Option: C
Explanation:

Fucus, an alga is diplontic.

Which of the following modes of arrangement of sepals/petals is seen in pea and bean flowers?

  1. Valvate

  2. Twisted

  3. Imbricate

  4. Vexillary

  5. Racemose


Correct Option: D
Explanation:

There are five petals, the largest (standard) overlaps the two lateral petals (wings), which in turn overlap the two smallest anterior petals (keel); this type of aestivation is known as vexillary.

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