#cryptochrome MCQ

cryptochrome

Cryptochrome is structurally characterized by presence of:

B fits best: Photolyase homology region and C-terminal extension. Keep the cryptochrome basics straight and Photolyase homology region and C-terminal extension stands out as the precise answer. Avoid: A) Single domain only; C) Homeodomain; D) Leucine zipper. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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cryptochrome

Cryptochrome functions mainly in regulation of:

Photomorphogenesis (B) is correct here. This is core cryptochrome: once you know the definition or pathway step, Photomorphogenesis is the clear fit. The wrong ones are A) Photosynthesis; C) Respiration; D) Transpiration. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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cryptochrome

Which cryptochrome has photolyase activity?

The right choice is C: CRY3. In cryptochrome, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) CRY1; B) CRY2; D) None. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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cryptochrome

CRY3 protein is localized primarily in:

Correct option is B, Chloroplasts and mitochondria. In cryptochrome problems like this, the accurate statement is Chloroplasts and mitochondria; the others are common mix-ups. Not these: A) Nucleus only; C) Plasma membrane; D) Cell wall. Tissue transport questions usually turn on xylem vs phloem, living vs dead cells, or source vs sink.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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cryptochrome

Cryptochrome localization in plant cells is mainly in the:

The right choice is C: Nucleus. In cryptochrome, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Cytoplasm; B) Plasma membrane; D) Cell wall. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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cryptochrome

CRY1 protein stability in blue light is:

The right choice is C: High. In cryptochrome, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Very low; B) Moderate; D) Absent. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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PSS-Sec-E-Sensory biology

Cryptochromes are photoreceptors mainly for:

That points to B: Blue light. Compared with the other options, Blue light is the one that correctly describes the PSS-Sec-E-Sensory biology concept. The wrong ones are A) Red light; C) Far-red light; D) Green light. If you’re stuck, eliminate anything that contradicts a basic fact you already know for this topic.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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