Mix Test

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Mix Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

The structure of bilobed anther consists of

A
2 thecae, 2 sporangia

B
4 thecae, 4 sporangia

C
4 thecae, 2 sporangia

D
2 thecae, 4 sporangia

Solution

2 thecae, 4 sporangia
Question 2
1 / -0

The coconut water from tender coconut is

A
cellular endosperm

B
free nuclear endosperm

C
both cellular and nuclear endosperm.

D
free nuclear embryo

Solution

Free nuclear endosperm.
Question 3
1 / -0

Pollen grains are well preserved as fossils because of presence of

A
sporopollenin

B
cellulose

C
lignocellulose

D
pectocellulose
Question 4
1 / -0

Which of the following statements are correct with respect to hormones secreted by placenta?

(i) Placenta secretes relaxin during later stage of pregnancy.

(ii) Placenta secretes high amount of FSH during pregnancy.

(iii) Placenta secretes relaxin during initial stage of pregnancy.

(iv) Placenta secretes hCG and hPL during pregnancy

A
(i) and (iv)

B
(i), (ii) and (iv)

C
(iii) and (iv)

D
(ii), (iii) and (iv)
Question 5
1 / -0

Penetration of the sperm in the ovum is followed by

A
formation of first polar body.

B
completion of meiosis II.

C
first meiosis

D
dissolution of zona pellucida.

Solution

completion of meiosis II
Question 6
1 / -0

The correct sequence of hormone secretion from beginning of menstruation is

A
FSH, progesterone, estrogen.

B
estrogen, FSH, progesterone.

C
FSH, estrogen, progesterone

D
estrogen, progesterone, FSH

Solution

FSH,estrogen,progesterone.
Question 7
1 / -0

The thalamus contributes to the fruit formation in

A
banana

B
orange

C
strawberry

D
guava
Question 8
1 / -0

How many types of gametes would be produced if the genotype of a parent is AaBB?

A
1

B
2

C
3

D
4
Question 9
1 / -0

Which of the following statements indicates parallelism in genes and chromosomes?

(i) They occur in pairs

(ii) They segregate during gamete formation

(iii) They show linkage

(iv) Independent pairs segregate independently

A
(i) and (iii)

B
(ii) and (iii)

C
(i), (ii) and (iii)

D
(i), (ii) and (iv)
Question 10
1 / -0

Which of the following amino acid substitution is responsible for causing sickle cell anemia?

A
Valine is substituted by Glutamic acid in the \(\alpha\) globin chain at the sixth position

B
Valine is substituted by Glutamic acid in the \(\beta \) globin chain at seventh position

C
Glutamic acid is substituted by Valine in the \(\alpha\) globin chain at the sixth position

D
Glutamic acid is substituted by Valine in the \(\beta\) globin chain at the sixth position

Solution

Glutamic acid is substituted by Valine in the \(\beta\) globin chain at the sixth position
Question 11
1 / -0

In human beings, where genotype AABBCC represents dark skin colour, aabbcc represents light skin colour and AaBbCc represents intermediate skin colour; the pattern of genetic inheritance can be termed as:

A
Pleiotropy and codominance

B
Pleiotropy and incomplete dominance

C
Polygenic and qualitative inheritance

D
Polygenic and quantitative inheritance

Solution

Polygenic and quantitative inheritance
Question 12
1 / -0

Which of the following combination of chromosome numbers represents the correct sex determination pattern in honey bees?

A
Male 32, Female 16

B
Male 16, Female 32

C
Male 31, Female 32

D
Female 32, Male 31
Question 13
1 / -0

Rajesh and Mahesh have defective haemoglobin due to genetic disorders. Rajesh has too few globin molecules while Mahesh has incorrectly functioning globin molecules. Identify the disorder they are suffering from.

A

Rajesh Mahesh

Sickle cell anaemia- an autosome linked recessive trait Thalassemia-an autosome linked dominant trait

B

Rajesh Mahesh

Thalassemia-an autosome linked recessive blood disorder Sickle cell anaemia- an autosome linked recessive trait

C

Rajesh Mahesh

Sickle cell anaemia- an autosome linked recessive trait Thalassemia-an autosome linked recessive blood disorder

D

Rajesh Mahesh

Thalassemia-an autosome linked recessive blood disorder Sickle cell anaemia- an autosome linked dominant trait

Solution

Rajesh Mahesh

Thalassemia-an autosome linked recessive blood disorder Sickle cell anaemia- an autosome linked recessive trait
Question 14
1 / -0

Which of the following criteria must a molecule fulfil to act as a genetic material?

(i) It should not be able to generate its replica

(ii) It should chemically and structurally be stable

(iii) It should not allow slow mutation

(iv) It should be able to express itself in the form of Mendelian Characters

A
(i) and (ii)

B
(ii) and (iii)

C
(iii) and (iv)

D
(ii) and (iv)
Question 15
1 / -0

The promoter site and the terminator site for transcription are located at

A
3′ (downstream) end and 5′ (upstream) end, respectively of the transcription unit

B
5′ (upstream) end and 3′ (downstream) end, respectively of the transcription unit

C
the 5′ (upstream) end of the transcription unit

D
the 3′ (downstream) end of the transcription unit

Solution

5′ (upstream) end and 3′ (downstream) end, respectively of the transcription unit.
Question 16
1 / -0

Which of the following is correct about mature RNA in eukaryotes?

A
Exons and introns do not appear in the mature RNA

B
Exons appear, but introns do not appear in the mature RNA.

C
Introns appear, but exons do not appear in the mature RNA

D
Both exons and introns appear in the mature RNA.

Solution

Exons appear but introns do not appear in the mature RNA.
Question 17
1 / -0

In E.coli, the lac operon gets switched on when

A
lactose is present and it binds to the repressor.

B
repressor binds to operator

C
RNA polymerase binds to the operator

D
lactose is present and it binds to RNA polymerase

Solution

Lactose is present, and it binds to the repressor.
Question 18
1 / -0

Oswald Avery, Colin MacLeod and Maclyn McCarty used enzymes to purify biochemicals such as proteins, DNA and RNA from the heat-killed S cells to see which ones could transform live R cells into S cells in Griffith's experiment. They observed that

A
Proteases and RNases affected transformation.

B
DNase inhibited transformation.

C
Proteases and Lipases affected transformation.

D
RNases inhibited transformation.

Solution

DNase inhibited transformation
Question 19
1 / -0

Short stretches of DNA used to identify complementary sequence in a sample arecalled

A
probes

B
markers

C
VNTRs

D
primers

Solution

Probes
Question 20
1 / -0

Assertion: Lactational amenorrhea is the natural method of contraception.

Reason: It increases the phagocytosis of sperm.

A
Both A and R are true and R is the correct explanation of A

B
Both A and R are true and R is not the correct explanation of A

C
A is true but R is false

D
A is False but R is true
Question 21
1 / -0

Assertion: Saheli, an oral contraceptive for females, contains a steroidal preparation.

Reason: It is a "once a week" pill with very few side effects

A
Both A and R are true and R is the correct explanation of A

B
Both A and R are true and R is not the correct explanation of A

C
A is true but R is false

D
A is False but R is true

Solution

A is False but R is true
Question 22
1 / -0

Assertion: Parturition is induced by a complex neuro endocrine meachanism.

Reason: At the end of gestation period, the maternal pituitary releases prolactin which causes uterine contractions.

A
Both A and R are true and R is the correct explanation of A

B
Both A and R are true and R is not the correct explanation of A

C
A is true but R is false

D
A is False but R is true

Solution

A is true but R is False.
Question 23
1 / -0

Assertion: When the two genes in a dihybrid cross are situated on the same chromosome, the proportion of parental gene combinations is much higher than nonparental type.

Reason: Higher parental gene combinations can be attributed to crossing over betweentwo genes.

A
Both A and R are true and R is the correct explanation of A

B
Both A and R are true and R is not the correct explanation of A

C
A is true but R is false

D
A is true but R is false

Solution

A is true but R is false
Question 24
1 / -0

In a fertilized ovule, n, 2n and 3n conditions occur respectively in

A
antipodal, zygote and endosperm

B
zygote, nucellus and endosperm

C
endosperm, nucellus and zygote

D
antipodals, synergids and integusments

Solution

antipodal, zygote and endosperm

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Re-Attempt Weekly Quiz Competition

Rajesh	Mahesh
Sickle cell anaemia- an autosome linked recessive trait	Thalassemia-an autosome linked dominant trait

Rajesh	Mahesh
Thalassemia-an autosome linked recessive blood disorder	Sickle cell anaemia- an autosome linked recessive trait

Mix Test - 2

Result

Mix Test - 2

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Rank

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SHARING IS CARING

Question 1

2 thecae, 2 sporangia

4 thecae, 4 sporangia

4 thecae, 2 sporangia

2 thecae, 4 sporangia

Solution

Question 2

cellular endosperm

free nuclear endosperm

both cellular and nuclear endosperm.

free nuclear embryo

Solution

Question 3

sporopollenin

cellulose

lignocellulose

pectocellulose

Question 4

(i) and (iv)

(i), (ii) and (iv)

(iii) and (iv)

(ii), (iii) and (iv)

Question 5

formation of first polar body.

completion of meiosis II.

first meiosis

dissolution of zona pellucida.

Solution

Question 6

FSH, progesterone, estrogen.

estrogen, FSH, progesterone.

FSH, estrogen, progesterone

estrogen, progesterone, FSH

Solution

Question 7

banana

orange

strawberry

guava

Question 8

1

2

3

4

Question 9

(i) and (iii)

(ii) and (iii)

(i), (ii) and (iii)

(i), (ii) and (iv)

Question 10

Valine is substituted by Glutamic acid in the \(\alpha\) globin chain at the sixth position

Valine is substituted by Glutamic acid in the \(\beta \) globin chain at seventh position

Glutamic acid is substituted by Valine in the \(\alpha\) globin chain at the sixth position

Glutamic acid is substituted by Valine in the \(\beta\) globin chain at the sixth position

Solution

Question 11

Pleiotropy and codominance

Pleiotropy and incomplete dominance

Polygenic and qualitative inheritance

Polygenic and quantitative inheritance

Solution

Question 12

Male 32, Female 16

Male 16, Female 32

Male 31, Female 32

Female 32, Male 31

Question 13

Rajesh Mahesh Sickle cell anaemia- an autosome linked recessive trait Thalassemia-an autosome linked dominant trait

Rajesh Mahesh Thalassemia-an autosome linked recessive blood disorder Sickle cell anaemia- an autosome linked recessive trait

Rajesh Mahesh Sickle cell anaemia- an autosome linked recessive trait Thalassemia-an autosome linked recessive blood disorder

Rajesh Mahesh Thalassemia-an autosome linked recessive blood disorder Sickle cell anaemia- an autosome linked dominant trait

Solution

Rajesh Mahesh

Sickle cell anaemia- an autosome linked recessive trait Thalassemia-an autosome linked dominant trait

Rajesh Mahesh

Thalassemia-an autosome linked recessive blood disorder Sickle cell anaemia- an autosome linked recessive trait

Rajesh Mahesh

Sickle cell anaemia- an autosome linked recessive trait Thalassemia-an autosome linked recessive blood disorder

Rajesh Mahesh

Thalassemia-an autosome linked recessive blood disorder Sickle cell anaemia- an autosome linked dominant trait