Dakshana Mock Test Season X

Dakshana Mock Test Season X

1] The two daughter cells produced by mitosis are similar, but are they likely to be absolutely genetically identical?

i. Yes, as they are produced by mitosis
ii. Yes, as they are produced by same mother cell
iii. Yes, as the DNA copying machinery is highly accurate
iv. No, as there could be slight variation in their DNA due to mutation

2] Reason for the greater similarities among the offsprings produced by asexual reproduction, is:

(a) Asexual reproduction involves only one parent
(b) Asexual reproduction involves two parents
(c) Asexual reproduction involves gametes
(d) Asexual reproduction doesn not involve gametes

i. (a) and (b)
ii. (a) and (c)
iii. (b) and (d)
iv. (a) and (d)

3] A Planaria worm is cut horizontally in the middle into two halves P and Q such that the part P contains the whole head of the worm. Another Planaria worm is cut vertically into two halves R and S in such a way that both the cut pieces R and S contain half head each. Which of the cut pieces of the two Planaria worms could regenerate to form the complete respective worms?

i. Only P
ii. Only R and S
iii. P, R and S
iv. P, Q, R and S

4] A complete flower has ____ whorls.

i. 1
ii. 2
iii. 3
iv. 4

5] Which of the following statements are true for flowers?

(a) Flowers are always bisexual
(b) They are the sexual reproductive organs
(c) They are produced in all groups of plants
(d) After fertilisation they give rise to fruits

i. (a) and (d)
ii. (b) and (c)
iii. (a) and (c)
iv. (b) and (d)

6] Double fertilization means

i. Fusion of two male gametes and one female gamete
ii. Fusion of 1st male gamete with egg cell and 2nd with synergid
iii. Fusion of 1st male gamete with egg cell and 2nd with central cell
iv. Fusion of 1st male gamete with egg cell and 2nd with antipodal cell

7] Match the column.

Column IColumn II
(A)Ovary(a)Seed
(B)Ovule(b)Embryo
(C)Egg cell(c)Fruit
i. A-a, B-b, C-c
ii. A-b, B-a, C-c
iii. A-c, B-a, C-b
iv. A-c, B-b, C-a

8] The ratio of number of chromosomes in a human zygote and a human sperm is:

i. 2:1
ii. 3:1
iii. 1:2
iv. 1:3

9] Which among the following are not the functions of testes at puberty?

(a) Formation of germ cells
(b) Secretion of testosterone
(c) Development of placenta
(d) Secretion of estrogen

i. (a) and (b)
ii. (a) and (c)
iii. (b) and (d)
iv. (c) and (d)

10] Tubectomy is carried out by blocking the

i. oviduct
ii. uterus
iii. epididymis
iv. vas deferens

11] Immature eggs in female are formed during

i. Foetal condition
ii. Just after birth
iii. Puberty
iv. One per month

12] When pure tall and pure dwarf plants are crossed, the F1 generation offsprings are all tall. It supports

i. 1st law of Mendelian inheritance
ii. 2nd law of Mendelian inheritance
iii. 3rd law of Mendelian inheritance
iv. Non-Mendelian inheritance

13] The phenotypic ratio in the F-2 generation of a dihybrid cross will be

i. 9:3:3:1
ii. 1:2:1:2:4:2:1:2:1
iii. 7:1:1:7
iv. 12:8:4

14] How many types of gamete can a human female and a human male produce respectively?

i. 2 and 2
ii. 2 and 1
iii. 1 and 2
iv. 1 and 1

15] Upon crossing two tall plants(parents), Mendel found some dwarf offsprings. What could be possible genotype of the parent plants?

i. TT & TT
ii. TT & Tt
iii. Tt & Tt
iv. tt & tt

16] In the human blood grouping, the four basic blood types are
type A, type B, type AB and type O. They are:

i. Simple dominant and recessive traits
ii. Co-dominant traits
iii. Recessive traits
iv. Inherited traits

17] A pregnant woman has an equal chance of her baby being blood group A or blood group AB. Which one of the following shows the possible genotypes of the woman and the father of her child?

i. IAIA and IBIO
ii. IAIB and IBIO
iii. IAIO and IBIO
iv. IOIB and IAIO

18] In human males, all the chromosomes are paired perfectly except one. These unpaired chromosomes are:

(a) Large chromosome
(b) Small chromosome
(c)Y chromosome
(d) X chromosome

i. (a) and (b)
ii. (b) and (c)
iii. (c) and (d)
iv. (b) and (d)

19] Which of the following statements is correct regarding variations?

i. Always provide survival advantage
ii. Do not provide survival advantage
iii. May or may not provide survival advantage
iv. Do not affect survival

20] Genetic drift is defined as

i. Change in gene frequency
ii. Accidental change in gene frequency
iii. Change in gene frequency due to natural selection
iv. Change in gene frequency due to mutation

21] The famous spark-flask experiment was conducted by

i. Darwin
ii. Oparin & Haldane
iii. Urey & Miller
iv. Louis Pasteur

22] Which of the following pair of organs is not homologous?

i. Forelimbs in humans and lizard
ii. Forelimbs in lizard and frog
iii. Wings in butterfly and bat
iv. None of these

23] The organs present in two organisms indicate that they are derived from the same ancestor, they are:

i. Analogous organs
ii. Respiratory organs
iii. Sense organs
iv. Homologous organs

24] What could be the reason for the fossil of an organism to be found in the deeper layers of the earth?

i. The extinction of organism has occurred few years back
ii. The extinction of organism has occurred thousands of years ago
iii. The position of fossil in the layers of earth is not related to its time of extinction
iv. Time of extinction cannot be determined

25] Which of the following statement is incorrect?

i. Humans have evolved from chimpanzees
ii. Humans are not pinnacle of evolution
iii. Scientific name for human is Homo sapiens
iv. Humans evolved in Africa







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