Biology MCQ | HSC Maharashtra Board



Biology MCQ | HSC

Biology HSC Maharastra Board Multiple Choice Questions With Answers

1) The outer layer of pollen grain is thick and made up of complex, non - biodegradable substance called as _______.

A) Lignin
B) Cellulose
C) Pectin
D) Sporopollenin

Ans : Sporopollenin

2) Sporoderm is made up of ______.

A) Exosporium and endosporium
B) Outer integuments and inner integument
C) Testa and tegmen
D) Exine and intine

Ans : Exine and intine

3) The number of meiotic and mitotic divisions necessary for development of female gametophyte in angiosperms is ______.

A) 1 meiosis and 2 mitosis
B) 1 mitosis and 3 meiosis
C) 1 meiosis and 1 mitosis
D) 1 meiosis and 3 mitosis.

Ans : 1 meiosis and 3 mitosis.

4) Identify the odd one with respect to pollinating agent.

A) Baobab
B) Bottle brush
C) Kadamb
D) Sausage

Ans : Bottle brush

5) In vitro pollen germination and pollen tube elongation can be induced by ______.

A) Boric acid
B) Glucose
C) Lactose
D) Sucrose

Ans : Sucrose

6) Self-incompatibility is found in flowers of plants _______.

A) Calotropis
B) Maize
C) Thea
D) Gloriosa

Ans : Thea

7) Porogamy refers to entry of pollen tube through ____________.

A) Integuments
B) Chalaza
C) Micropyle
D) Stigma

Ans : Micropyle

8) ______ is an example of helobial endosperm.

A) Adoxa
B) Coconut
C) Asphodelus
D) Sunflower

Ans : Asphodelus

9) The single shield-shaped cotyledon in monocot seed is known as ______.

A) Coleoptile
B) Scutellum
C) Aleurone layer
D) Perisperm

Ans : Scutellum

10) The example of dicot endospermic seed is ______.

A) Castor
B) Pea
C) Mango
D) Bean

Ans : Castor

11) The primary sex organ in human male is _______.

A) Prostate gland
B) Seminal vesicle
C) Penis
D) Testis

Ans : Testis

12) Seminal fluid is ______ in nature.

A) Acidic
B) Neutral
C) Sugary
D) Alkaline

Ans : Alkaline

13) Which of the following is not a part of the uterus?

A) Body
B) Cervix
C) Fundus
D) Cornua

Ans : Cornua

14) Meanrch, menstrual cycle, and menopause are controlled by ______.

A) Thyrotropic hormone
B) Gonadotropic hormone
C) Somatotropic hormone
D) Corticotropin

Ans : Gonadotropic hormone

15) Nebenkern is ______.

A) Acrosome of sperm
B) Neck of sperm
C) Middle piece of sperm
D) Mitochondrion of sperm

Ans : Mitochondrion of sperm

16) Nervous system develops from ______ of embryonic layer.

A) Endoderm
B) Chorion
C) Ectoderm
D) Mesoderm

Ans : Ectoderm

17) The average period of pregnancy in human lasts for ______ days of pregnancy.

A) 280
B) 270
C) 266
D) 290

Ans : 280

18) ______ is not a permanent method of birth control.

A) Vasectomy
B) Tubectomy
C) Withdrawal
D) Castration

Ans : Withdrawal

19) The organism which causes Gonorrhoea is ______.

A) Trepenoma
B) Neisseria
C) Entamoeaba
D) Salmonella

Ans : Neisseria

20) How many pairs of testis are present in human male?

          A) 2 pairs
B) 1 pair
C) Only one testis
D) Only one ovary

Ans : 1 pair

21) The three principles of Mendelism are

A) Dominance, segregation, and independent assortment
B) Linkage, segregation, and independent assortment
C) Linkage, dominance, and segregation
D) Linkage, dominance, and Independent assortment.

Ans : Dominance, segregation, and independent assortment

22) Which one of the following is back cross?

A) F1 × F1
B) F1 × Recessive parent
C) F1 × Dominant parent
D) F1 × Any parent

Ans : F1 × Any parent

23) RR (Red) Antirrhinum is crossed with white (rr) one. Offspring (Rr) are pink. This is an example of ______.

A) Dominant -recessive
B) Incomplete dominance
C) Hybrid
D) Supplementary genes

Ans : Incomplete dominance

24) The word chromosome was coined by

A) Benda
B) Waldeyer
C) Robert Hooke
D) T.H.Morgan

Ans : Waldeyer

25) Nullisomy is represented by ______.

A) (2n-1)
B) (2n-2)
C) (2n+1)
D) (2n+2)

Ans : (2n-2)

26) Identify the odd one:-

A) Monoploidy
B) Diploidy
C) Polyploidy
D) Hyperploidy

Ans : Hyperploidy

27) In humans, the sex chromosome complement is


Ans : XX-XY

28) A family has five daughters and expecting sixth child. The chance of its beings a son is

A) Zero
B) 25%
C) 50%
D) 100%

Ans : 50%

29) In human beings 45 chromosomes/single X/XO abnormality causes ______.

A) Down's syndrome
B) Klinfelter's syndrome
C) Turner's syndrome
D) Edward's syndrome

Ans : Turner's syndrome

30) Webbed neck is characteristic of ______ syndrome.


Ans : XO

31) Find the odd one out:

A) H2A
B) H3
C) H2B
D) H1

Ans : H1

32) What happened when heat-killed S-cells along with living R-cells were injected into mice?

A) Mice died and showed live S-cells
B) Mice survived and showed live S-cells
C) Mice died and showed live R-cells
D) Mice died and showed dead R-cells

Ans : Mice died and showed live S-cells

33) Find out the double ring compound.

A) Adenine
B) Uracil
C) Cytosine
D) Thymine

Ans : Adenin

34) If a DNA has 20 Adenine and 30 cytosine bases. What will be the total number of purine bases in the given sample?

A) 20
B) 50
C) 30
D) 100

Ans : 50

35) Semiconservative mechanism of DNA was detected using:

A) 35S
B) 14C
C) 32P
D) 15N

Ans : 15N

36) A template strand of DNA has the base sequence CATGATTAC. New strand synthesized on it will be:



 37) During DNA replication, the separated strands of DNA are prevented from recoiling by

A) DNA primase
B) Sigma factor
C) Rho-factor

Ans : SSBP

38) In which of the following synthesis of DNA strand is not involved directly?

C) Another DNA strand
D) Protein

Ans : Protein

39) Wobble hypothesis is related with

A) Ambiguity in codon
B) Purine pyrimidine equality
C) Genetic code is triplet
D) Degeneracy of genetic code and economy of tRNA molecules in the cell

Ans : Degeneracy of genetic code and economy of tRNA molecules in the cell

40) During elongation of polypeptide chain, sigma factor is

A) Functionless
B) Retained for specific function
C) Released for re-use
D) Required during closing of chain

Ans : Functionless

41) Enzyme required for peptide formation is

A) Peptidase
B) Peptidyl transferase
C) Nitrogenase
D) Nitrate reductase

Ans : Peptidyl transferase

42) Exon segments are reunited after splicing by

A) RNA primase
B) RNA protease
C) RNA polymerase
D) RNA ligase

Ans : RNA polymerase

43) In lac operon, lactose acts as:

A) Inducer
B) Co-inducer
C) Repressor
D) Co-repressor

Ans : Inducer

44) A unit of lac-operon which in the absence of lactose, suppresses the activity of operator gene is

A) Structural gene
B) Regulatory gene
C) Repressor protein
D) Promoter gene

Ans : Regulatory gene

45) _______ is considered as connecting link between ape and man.

A) Australopithecus
B) Homo habilis
C) Homo erectus
D) Neanderthal man

Ans : Australopithecus

46) Humans are most closely related to ______.

A) Marsupial
B) Lemur
C) Chimpanzees
D) Tarsier

Ans : Chimpanzees

47) The proportion of an allele in the gene pool to the total number of alleles at a given locus is called _______.

A) Gene pool
B) Gene frequency
C) Gene flow
D) Genetic drift

Ans : Gene frequency

48) Transfer of a part of chromosome or set of genes to a non-homologous chromosome is called ________.

A) Deletion
B) Duplication
C) Inversion
D) Translocation

Ans : Translocation

49) Any random fluctuation in allele frequency, occurring in the natural population by pure chance is called __________.

A) Gene pool
B) Gene mutation
C) Genetic recombination
D) Genetic drift

Ans : Genetic drift

50) Water present in the form of hydrated oxides of Silicon, Aluminium is called ______.

A) Hygroscopic Water
B) Gravitational Water
C) Combined Water
D) Capillary Water

Ans : Combined Water

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