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Latest Biology MCQs
Recently added questions from this subject.
A number of algae associated with other organisms being associated in their tissues are known as
- A. Epiphytes
- B. Endophytes
- C. Symbionts
- D. Benthon
Correct Answer: B
In many plants the xylem and the ray parenchyma cells develop protrusions that enter tracheary cells when these become inactive or the xylem tissue is injured, which are known as
- A. Sieve plates
- B. Tyloses
- C. Cambia
- D. None of the above
Correct Answer: B
The phylum Phaeophyta is a group in which the usual photosynthetic pigments are marked by a golden brown pigment called
- A. Phycocyanin
- B. Fucoxanthin
- C. Phycobilin
- D. Both A and C
Correct Answer: B
Clove is a
- A. Buds of stem
- B. Bales of root
- C. Closed buds
- D. Seed
Correct Answer: C
Smallest man-like ape is
- A. Gibbon
- B. Chimpanzee
- C. Gorilla
- D. Orangutan
Correct Answer: A
Which of the following forms the core of the virus particle?
- A. Amino acid
- B. Protein sheath
- C. Nucleic acid
- D. Nucleoprotein
Correct Answer: C
According to Besseyan principles,
- A. Perigynous flowers are more primitive than hypogynous flowers
- B. Actinomorphic flowers are more primitive than zygomorphic flowers
- C. Dioecism is more primitive than monoecism
- D. Syncarpous pistil is more primitive than apocarpus pistil
Correct Answer: B
The lambda phage DNA is inserted into the E. coli DNA at a specific site between
- A. The lac operon and the bio operon
- B. The gal operon and the his operon
- C. The gal operon and the bio operon
- D. The lac operon and the his operon
Correct Answer: C
The secondary permanent tissues, such as secondary xylem, secondary phloem and cork, are always derived from
- A. Apical meristems
- B. Intercalary meristems
- C. Lateral meristems
- D. All of the above
Correct Answer: C
Groups of secondary phloem present scattered among the secondary xylem are known as
- A. Intraxylary phloem
- B. Interxylary phloem
- C. Internal phloem
- D. Both A and C
Correct Answer: B
Consider the following statements and choose the correct answer: 1. Sieve cells are present in all groups of plants 2. Transverse position of end walls of sieve tubes is a primitive feature whereas their oblique or inclined position is an advanced condition 3. Restriction of sieve areas on the end wall is a primitive condition whereas their presence on end wall as well as radial wall is an advanced condition 4. The sieve plates with larger sieve pores are advanced
- A. Only 2 and 3 are true
- B. Only 3 is true
- C. Only 4 is true
- D. Only 1, 2 and 3 are true
Correct Answer: C
Match List-I with List-II and select the correct answer: List-I List-II a. Promeristem 1. Based on position b. Apical meristem 2. Based on function c. File meristem 3. Based on plane of divisions d. Ground meristem 4. Based on origin
- A. a-1, b-3, c-2, d-4
- B. a-1, b-2, c-3, d-4
- C. a-4, b-1, c-3, d-2
- D. a-4, b-2, c-1, d-3
Correct Answer: C
