NEET Test Series-2021 to 2022 MCQ Quiz Hub

1. A chromosome with a very short arm and a very long arm is referred to as
Metacentric
telocentric
Acrocentric
Sub-metacentric

2. A chromosome is the thickest during
anaphase
prophase
interphase
metaphase

3. The diagrammatic representation of karyotype (morphological representation of chromosomes) of a species is known as
Cladogram
Ecogram
Chromogram
Idiogram

4. If Bb is a gene pair of an individual then the alleles for this gene pair are
A and B
a and A
 a and b
b and B

5. Euchromatin
stains lightly
 is partially condensed
genetically active chromatin with genes
 all of the above

6. The point at which polytene chromosomes appear to be attached together is known as
centriole
 centromere
 chromomere
chromocenter

7. In which typical stage are Lampbrush chromosomes observed?
meiotic prophase
mitotic metaphase
mitotic prophase
mitotic anaphase

8. Each of the chromosome at the anaphase stage of a bone marrow cell in our body has
one chromatid
two chromatids
several chromatids
no chromatids

9. Rapid heartbeat, shortness of breath, high body temperature are the symptoms of ___________.
Thyroid crisis
Thyroid storm
Thyroid failure
Thyroid death

10. Thyroid disorders are often mistaken for this condition.
Pregnancy
Menopause
Crohn’s disease
Posttraumatic stress disease

11. A 35-years-old female present to the hospital with symptoms of sudden onset of pain in the anterior neck spreading to the jaw from the past 2 days. Other than these symptoms, she also reported a full recovery from ‘a cold a week ago’. Which of the following findings are not consistent with her diagnosis.
Formation of microabscesses
Dense fibrosis of the thyroid gland
Neutrophilic filtration of thyroid
Plasma cells aggregating around damaged thyroid follicles

12. A condition marked by low TSH levels is called ___________.
Hypothyroidism
Goitre
Hyperthyroidism
 Thyroid cancer

13. A 30-year old female presents with fatigue, fever, swelling in the neck area along with pain and difficulty in swallowing. Upon diagnosing, tenderness on palpation of thyroid in elicited. The lab reports showed elevated ESR, elevated T4, T3, and thyroglobulin levels. The 24hrs RAIU report is lesser than 5 per cent. What is diagnosed according to the patient’s lab reports?
Grave’s disease
Subacute thyroiditis
Hashimoto’s thyroiditis
Acute infectious thyroiditis

14. Which of the following body function is regulated by the thyroid producing hormones?
Digestion
Temperature
 Metabolism
Blood pressure

15. Rapid heart rate, weight loss, heat sensitivity are most likely the symptoms of _________
Thyroid cancer
Hyperthyroidism (overactive thyroid)
 Hypothyroidism (underactive thyroid)
 All of the above

16. Exophthalmic goitre is due to ________.
Hyposecretion of thyrocalcitonin
Hyposecretion of thyroxine
Hypersecretion of thyroxine
Hypersecretion of thyrocalcitonin

17. Which type of epithelium is found in thyroid follicles?
Columnar
Squamous
Cuboidal
Transitional

18.  Which of the following is the major causative for Grave’s disease?
Hyperactivity of thyroid gland
Hyperactivity of adrenal cortex
Hyperactivity of adrenal medulla
Hyperactivity of the islets of Langerhans

19. In many laboratories, active research is on to comprehend the genetics of apomixis
 Apomixis generates genetically different individuals
 Apomixis is the method to produce seeds without fertilization
Hybrid plants are directly formed by apomixis
Transfer of apomictic genes into hybrid varieties that shall prevent hybrid vigour loss over the years

20. Apomixis is a form of
Vernalization
Parthenogenesis
Parthenocarpy
None of the above

21. Geitonogamy and autogamy both are prevented in which one of these?
Cucumber
 Maize
Castor
Papaya

22. In plants, apomixis pertains to plant development
from root cuttings
from cuttings of stem
 without the gametes having to fuse
fusion of gametes

23. The reason why hybrid seeds have to be produced every year is
 hybrid seed industry tends to increase the cost of seeds
hybrid plants turn sterile in coming years
show more heterosis in coming years
 hybrid vigour is not maintained in more than one generation as segregation of genes is initiated in the second generation

24. In adventive embryony, a type of apomixis, the embryo develops directly from the
Zygote
accessory embryo sacs in the ovule
 antipodals or synergids in an embryo sac
 integuments or nucleus

25. Megasporium is equivalent to
ovule
embryo sac
fruit
 Nucleus

26. One of these statements about apomixis is incorrect
formation of seeds without fertilization
Meiotic division and fertilization of gametes takes place to form a zygote
Seeds are genetically similar
None of these

27. This about apomixis is true:
There is no fertilization involved in both apomixis and parthenocarpy
Apomixis produces genetically identical mother cells
Apomixis is observed in angiosperms and gymnosperms
All of the above

28. The difference between perisperm and endosperm is that perisperm:
has reserve food
forms by fusion of the secondary nucleus with several sperms
is a diploid tissue
is a haploid tissue

29. Haemophilia is caused by
Bacteria
Virus
 Genetic mutation
Cause unknown

30. This is a complication of haemophilia
Bleeding in the head
 joint swelling
death
all of these

31. In patients with haemophilia, which of these can increase the risk of cerebral microbleeds?
cardiovascular risk factors
increased age
Hepatitis C infection
all of these

32. This disease falls under the same category as colourblindness in man
Presbyopia
Night blindness
 Diabetes insipidus
Haemophilia

33. This is ineffective against antibiotics
bacterial infected gonorrhoea
bacterial infected wound
 haemophilia
bacterial infected throat

34. This lacks in patients with haemophilia A
X chromosome
Calcium
Antihemophilic factor
Plasma thromboplastin

35. Rarely females experience the physiological defect of haemophilia as they do so only when they are
carrier for the defect
 wives of haemophilic husbands
 homozygous for the defect
heterozygous for the defect

36. Haemophilia is
X – linked
 Y – linked
 Z – linked
Autosomal

37. Haemophilia is as a result of a lack of
STH
ADH
 AHF
 ACTH

38.  The reason why haemophilia is more commonly observed in human males than in females is due to
 the disease is due to Y-linked recessive mutation
the disease is due to X-linked recessive mutation
as a huge population of girls die in infancy
the disease is due to X-linked dominant mutation

39. Which of the following factors promotes the opening of the stomatal aperture?
 A decrease in guard cell turgidity
When the outer walls of the guard cells contracts
Radial orientation of the cellulose microfibrils in the cell wall of the guard cells
The longitudinal orientation of the cellulose microfibrils in the cell wall of guard cells

40. Which of the following is made of dead cells?
 Phloem
Phellem
Collenchyma
Xylem parenchyma

41. Which of the following statement are true about the Tyloses – the balloon-shaped structures?
Characterise the sapwood
Original in the lumen of vessels
Are linked to the ascent sap through xylem vessels
Are extensions of the xylem parenchyma cells into vessels

42. Which of the following events takes place in a ring girdled plant?
The eath of the root first
The death of the shoot first
 The shoots and the root dies first
Neither the shoot nor the root will die

43. This is one of the most recent and valid explanations for stomatal movements.
Starch hydrolysis
 Transpiration
Guard cell photosynthesis
Potassium efflux and the influx

44. Which of the following are the primary water-conducting elements of xylem in gymnosperms?
Fibres
Vessels
Tracheids
Transfusion tissue

45. Which of the following is not a lateral meristem?
Phellogen
 Cork cambium
 Intercalary meristem
Interfascicular cambium

46. In monocots, grafting is not possible as _________
They show parallel venation
 they have scattered vascular bundles
they lack cambium
 they are herbaceous

47. Vascular bundles are closed in monocots as:
presence of vascular cambium between xylem and phloem
 presence of xylem and phloem
 absence of vascular cambium
xylem and phloem occur in separate bundles

48. Difference between heartwood and sapwood is that heartwood
 shows the presence of fibres and rays
has dead and non-conducting elements
 lacks parenchyma and vessels
 is susceptible to pathogens and pests

49. DNA fingerprinting recognizes the differences in
 satellite DNA
 bulk DNA
Repetitive DNA
both (a) and (c)

50. This force can stabilize a DNA double-helix 
Hydrophilic sugar-phosphate groups are found on the exterior of the helix where interaction with water occurs
Hydrophobic bases are present in the interior of the helix, each base-pair is stabilized by the same number of hydrogen bonds
covalent base stacking interactions may take place between neighbouring bases within the same strand in the helix
non-covalent N-glycosidic bonds may form between nitrogenous bases in opposite strands in the helix