NEET TEST SERIES 95 BIOLOGY

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1. In a typical embryo sac, the number of nuclei and cells are:

a) 8 nuclei and 7 cells
b) 8 nuclei and 8 cells
c) 7 nuclei and 7 cells
d) 6 nuclei and 6 cellsDeselect Answer

a)

b)

c)

d)

None

2. In a typical embryo sac, the antipodal cells are:

a) Haploid and located at the chalazal end
b) Diploid and located at the micropylar end
c) Triploid and located at the chalazal end
d) Haploid and located at the micropylar endDeselect Answer

a)

b)

c)

d)

None

3. The primary endosperm nucleus (PEN) is formed by the fusion of:

a) One male gamete and two polar nuclei
b) One male gamete and one egg cell
c) Two male gametes and one polar nucleus
d) One male gamete and one synergidDeselect Answer

a)

b)

c)

d)

None

4.In angiosperms, various stages of reductional division can best be studied in

a) young anthers
b) young ovules
c) mature anthers
d) endosperm cells.Deselect Answer

a)

b)

c)

d)

None

5. Pick out the wrong statement

a) Histones are rich in Lysine and Arginine
b) Histones contain 8 molecules
c) Histones carry positive charge in the side chain
d) The pH of histones is slightly acidic.Deselect Answer

a)

b)

c)

d)

None

6. A plant exhibits simple leaves arranged in a whorled pattern with a characteristic reticulate venation. Which of the following plants possesses this leaf morphology?”

a) Calotropis

b) Neem

c) China rose

d) Alstonia

Deselect Answer

a)

b)

c)

d)

None

7. Which of the following plants exhibits axile placentation?

a) pea
b) Argemone
c) Dianthus
d) lemon

Deselect Answer

a)

b)

c)

d)

None

8. In plant growth, cells originating from the root apical meristem, shoot apical meristem, and cambium undergo a process where they acquire specific structures and functions. This process, leading to the specialization of these cells, is known as?”

a) Differentiation
b) Dedifferentiation
c) Redifferentiation
d) Heterophylly

Deselect Answer

a)

b)

c)

d)

None

9. Study the given flow chart. Which of the following are the correct examples of W, X, Y and Z?

Deselect Answer

a)

b)

c)

d)

None

10. Which of the following correctly differentiates the reproductive strategies of Fucus and Volvox?

a) Volvox exhibits oogamy, whereas Fucus follows isogamy.
b) Both Fucus and Volvox produce motile gametes of equal size.
c) Fucus exhibits oogamy with distinct male and female gametes, while Volvox may show isogamy or anisogamy.
d) Both Fucus and Volvox undergo anisogamy, producing gametes.

Deselect Answer

a)

b)

c)

d)

None

11. In which of the following plants does the gametophyte remain nutritionally dependent on the sporophyte throughout its life cycle?

a) Polytrichum and Funaria
b) Cedrus and Pteris
c) Cedrus only
d) Pteris and Funaria

Deselect Answer

a)

b)

c)

d)

None

12. Assertion: Porphyra is an edible marine brown alga.
Reason: It is popularly known as kelp.

a) Both assertion and reason are true and reason is the correct explanation of assertion.
b) Both assertion and reason are true but reason is not the correct explanation of assertion.
c) Assertion is true but reason is false.
d) Assertion is false but reason is true

Deselect Answer

a)

b)

c)

d)

None

13. Select the incorrect statement with respect to given type of life cycle.

a) A Meiosis occurs at the time of spore formation in sporophytic plant.
b) Gametophytic plant is produced by germination of spores.
c) This life cycle is exhibited by most algae and some seed bearing plants.
d) This life cycle is exhibited by many bryophytes and pteridophytes.

Deselect Answer

a)

b)

c)

d)

None

14. How much time will it take to fill half of the cup if a bacterial cell divides mitotically once in a minute and it takes one hour to fill the cup?

a) 30 minutes
b) 45 minutes
c) 20 minutes
d) 59 minutes

Deselect Answer

a)

b)

c)

d)

None

15. Swollen bead like areas considered to be genes can be observed on chromosomes in subphase of meiosis.

a) leptotene
b) zygotene
c) pachytene
d) diakinesis

Deselect Answer

a)

b)

c)

d)

None

16. Which of the following correctly describes the function of the G2/M checkpoint in the cell cycle?

a) A Ensures proper attachment of chromosomes to spindle fibers
b) Checks for DNA replication errors before mitosis
c) Determines if the cell should enter G0 phase
d) Monitors external growth signals before DNA replication

Deselect Answer

a)

b)

c)

d)

None

17. Refer to the given stages A, B, C and D of meiosis I and select the incorrect statement regarding them.

a) The last stage of A is diakinesis which is marked by terminalisation of chiasmata.
b) In stage B, microtubules from the opposite poles of the spindle attach to the pair of homologous chromosomes.
c) In stage C, homologous chromosomes separate, while sister chromatids remain associated at their centromeres.
d) In stage D, separation of chromosomes takes place, cytokinesis follows this stage and this is called as dyad of cells.

Deselect Answer

a)

b)

c)

d)

None

18. A defect in the Anaphase Promoting Complex (APC) of a human cell leads to the failure of securin degradation. Which of the following would be the most likely consequence of this defect during mitosis?

a) The metaphase plate will fail to form.
b) Chromatids will not separate during anaphase.
c) The spindle fibers will not attach to kinetochores.
d) Sister chromatids will undergo recombination.

Deselect Answer

a)

b)

c)

d)

None

19. Which of the following best describes the role of ethylene in fruit ripening?

a) Ethylene is a growth promoter that inhibits the breakdown of starch into sugars.
b) Ethylene accelerates the breakdown of starch into sugars and initiates fruit ripening.
c) Ethylene prevents fruit ripening by inhibiting the activity of amylase.
d) Ethylene has no significant role in fruit ripening.

Deselect Answer

a)

b)

c)

d)

None

131. The term ‘precursor of auxin’ refers to

a) A a compound that activates auxin’s biological function
b) a raw material converted into auxin through biochemical processes
c) a chemical that inhibits auxin’s action in plants
d) the final active molecule produced after auxin synthesis

Deselect Answer

a)

b)

c)

d)

None

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