NEET Test Series-2021 to 2022 MCQ Quiz Hub

1. The vertebral column provides more strength as a result of 4
burantals
 appendanges
 frontals
 curvatures

2. Dogs have specialized evaporative cooling in the respiratory tract by
woofing
licking
panting
 sleeping

3. This statement about Homeostasis is incorrect
because of this; the fluctuations of the internal environment are of extremely narrow range as compared to that of the external environment
there is a definite control system regulating the homeostatic activities
 homeostatic mechanisms keep the internal environment fixed despite wide changes in the external environment
all the above

4. Which of the following statement is incorrect about agar?
 Remains stable at incubation temperature
Does not react with media constituents
Does not use in micropropagation work
Not digested by plant enzymes

5. In tissue culture system; this is the main effect of cytokines
shoot elongation
adventitious root formation
induction of somatic embryos
adventitious shoot formation

6. This is not a basic component of culture media for plant cultivation
amino acids
sucrose/sugar
a complex mixture of salts
serum albumin

7. Which of the following plant propagation method uses girdling?
cuttings
grafting
layering
both (a) and (b)

8.  The ability of single cells to divide and produce all differentiated cells in the entity.
Totipotency
Multipotent
Pluripotent
Unipotent

9.  Which of the following is the first transgenic crop?
flax
 tobacco
plastic
cotton

10. Which of the following is not a feature of plant cells?
Consists of plastids
Cell wall outside the cell membrane
Presence of centrioles
 Cell-cell communication through plasmodesmata

11. Which of the following is a superbug?
virus
bacteria
transgenic plant
worms

12. This is a cellular totipotency property.
plants
animals
 virus
 none of the above

13. Growth of plant tissues in artificial media is called _______.
cell hybridization
plant tissue culture
transgenesis
gene expression

14. Abscission zone can be induced for formation by
 abscisic acid
cytokinins
gibberellins
auxins

15. Presence of this in the seed is linked with dormancy
 abscisic acid
gibberellic acid
starch
ethylene

16. Abscisic acid treatment results in
root elongation
 stomatal closure
stem elongation
leaf expansion

17. ABA contains
one asymmetric and two symmetric carbon atoms
one symmetric and two asymmetric carbon atoms
one asymmetric carbon atom
one symmetric carbon atom

18. Morphactins are
synthetic auxins
synthetic gibberellins
 synthetic growth regulators
none of these

19. Dormin is a
abscisic acid
growth promoter
auxin
 none of these

20. This is wound hormone
 phyllocaline
auxin
hormone only
necrohormone

21. This is a plant hormone
acetylene
 dormin
 formalin
all of these

22. This is a naturally occurring growth inhibitor
NAA
IAA
GA
ABA

23.  Abscisic acid regulates
leaf fall and dormancy
 cell division
cell elongation and cell wall formation
shoot elongation

24. A person with antigens A and B and no antibodies belongs to blood group or in which blood group antibodies are absent
O
 AB
B
 A

25. Inheritance of ABO blood group system is an example of
dominance
epistasis
 partial dominance
 multiple allelism

26. During the serological test in which anti-human serum is mixed with the blood of another animal; the blood of this animal gives the thickest precipitate
mule
 dog
chimpanzee
gibbon

27. In disputed parentage; blood group analysis of mother; alleged father and child can
not be of any use
 only prove that he cannot be the father
certainly prove a man to the father
none of these

28. If a patient with blood group B requires an immediate blood transfusion; this type can be given
 AB and B
AB and A
AB and O
 B and O

29.  In men; this is genetically dominant
Albinism
 Haemophilia
 Rh positive
color blindness

30. Color of the skin in humans is regulated by
polygenic effect
lethal genes
multiple genes
none of the above

31.  The recessive character typically is expressed only when present in a double recessive condition. But; a single recessive gene can express itself in humans when genes are found on
either on autosome or X chromosome
X chromosome of male
X chromosome of female
any autosome

32.  Two allelic genes are situated on
any two chromosomes
 two non-homologous chromosomes
 two homologous chromosomes
same chromosomes

33. Tricarpellary; the syncarpous gynoecium is found in these flowers
Liliaceae
 Poaceae
Fabaceae
Solanaceae

34. Perigynous flowers are found in________.
Rose
China rose
Cucumber
Guava

35.  Tulip; onion; cucumber; guava; potato; brinjal; mustard; china rose – amongst these; how many have superior ovary?
Six
Five
Four
Three

36. Standard petal of a papilionaceous corolla is known as_______.
 Carina
Corona
Vexillum
Pappus

37.  Free-central placentation is found in_______.
Citrus
 Brassica
Argemone
Dianthus

38. ____ is the large shield-shaped cotyledon; the wheat grain possesses in its embryo
coleoptile
 scutellum
 coleorhiza
epiblast

39. These flowers show radial symmetry______.
Cassia
Pisum
Trifolium
Brassica

40. Keel is the characteristics feature of the flower of_______.
 tomato
aloe
Indigofera
tulip

41.  These many plants among Salvia; Sesbania; Mustard; Indigofera; Aloe; Allium; groundnut; turnip; and radish gram possess stamens with diverse lengths in their flowers
six
five
 four
three

42. In the Caucasian population of the US; 1 in 2500 babies is affected by a recessive condition – cystic fibrosis. In this population; the frequency of the dominant allele is
0.02
0.36
 0.56
 0.98

43. A sampled “a” population has 36% of homozygous recessive genotype (aa). Then the frequency of allele “a” is
0%
20%
 60%
70%

44. 360 out of 1000 individuals in a population have a genotype of AA while 480 have Aa genotype. The rest 160 belong to aa. Frequency of allele A in this population is
0.7
0.6
0.5
0.4

45. A gene locus has two alleles A and a. If the frequency of dominant allele A is 0.4; then the frequency of homozygous dominant; heterozygous and homozygous recessive individuals in the population is
 0.16(AA); 0.48(Aa); 0.36(aa)
0.16(AA); 0.24(Aa); 0.36(aa)
 0.16(AA); 0.36(Aa); 0.48(aa)
 0.36(AA); 0.48(Aa); 0.16(aa)

46. What does p2 in the below mentioned Hardy-Weinberg equation indicate? (p+q)2 = p2 + 2pq + q2
 individuals that are heterozygous dominant
 individuals having a lethal allele
 individuals that are homozygous dominant
individuals that are homozygous recessive

47. 25 individuals in a population are homozygous dominant; then the individuals that are expected to be homozygous recessive are
100
75
 50
25

48. Consider a population of sheep to be in Hardy-Weinberg equilibrium. The allele for black wool(w) has an allele frequency of 0.81 while the allele for white wool(W) has an allele frequency of 0.19. Then the percentage of heterozygous individuals in the population is
 4%
15%
31%
66%

49. This condition is essential for a population to be in the Hardy-Weinberg equilibrium
 random mating
no mutations
 large population
all of these

50. This statement describes the Hardy-Weinberg law the best
 it is impossible to predict expected allele frequencies mathematically
in large populations; dominant alleles become more prevalent
allele frequency changes over a period of time in a large population
mechanism of inheritance in a large population does not change allele frequency