14620 + Mcqs in Biology McqOptions

1.	The role of nucleus in regulating the morphology of plant was discovered in [DPMT 1982; MHCET 2001]
A.	Maize
B.	Garden pea
C.	Neurospora
D.	Acetabularia
Answer» E.

Discussion

2.	Cell which does not contain nuclear membrane
A.	Bacteria
B.	Algae
C.	Fungi
D.	Lichen
Answer» B. Algae

Discussion

3.	True nucleus is absent in [CPMT 1987]
A.	Green algae
B.	Fungi
C.	Lichens
D.	Bacteria
Answer» E.

Discussion

4.	Nucleus is absent in
A.	Sieve tubes
B.	Companion cells
C.	Chlorenchyma
D.	All the above
Answer» B. Companion cells

Discussion

5.	The structure of nuclear membrane facilitates [CPMT 1985, 2002]
A.	Synapsis of homologous chromosomes at meiosis
B.	Nucleo-cytoplasmic exchange of materials
C.	Anaphasic separation of daughter chromosomes
D.	Organization of spindles
Answer» C. Anaphasic separation of daughter chromosomes

Discussion

6.	Histone proteins found in nuclei of eukaryotes are [CPMT 2000]
A.	Acidic
B.	Basic
C.	Neutral
D.	Amphoteric
Answer» C. Neutral

Discussion

7.	Pars amorpha is associated with [CMC Vellore 1994]
A.	Nucleus
B.	Chloroplast
C.	Mitochondria
D.	Nucleolus
Answer» E.

Discussion

8.	Nucleoli are rich in [CPMT 1982; CBSE PMT 1993; BHU 2001; MP PMT 2003]
A.	DNA and RNA
B.	DNA, RNA and proteins
C.	DNA
D.	RNA
Answer» C. DNA

Discussion

9.	The "master mind'' of the cell is
A.	Protoplast
B.	Nucleolus
C.	Nucleus
D.	Plastid
Answer» D. Plastid

Discussion

10.	Watson has calculated the nuclear pores of the mammalian cells to be ...... of the total surface area of the nucleus
A.	5 percent
B.	50 percent
C.	25 percent
D.	10 percent
Answer» C. 25 percent

Discussion

11.	ATP is [BVP 2002]
A.	Nucleotide
B.	Nucleoside
C.	Nucleic acid
D.	Hormone
Answer» B. Nucleoside

Discussion

12.	ATP is [Orissa PMT 2002]
A.	Adenosine D-ribose three phosphate
B.	Adenosine L-ribose three phosphate
C.	Adenine D-ribose three phosphate
D.	Adenine L-ribose three phosphate
Answer» D. Adenine L-ribose three phosphate

Discussion

13.	Which of the following is a purine [MP PMT 1999]
A.	Prokaryotes
B.	Guanine
C.	Thymine
D.	Uracil
Answer» C. Thymine

Discussion

14.	DNA differs from RNA [BHU 2003]
A.	In the nature of sugar alone
B.	In the nature of purines alone
C.	In the nature of sugar and pyrimidines
D.	None of the above
Answer» D. None of the above

Discussion

15.	RNA is absent in [BHU 1980; MP PMT 1986; MHCET 2003]
A.	Plasmalemma
B.	Cytoplasm
C.	Chromosomes
D.	Ribosomes
Answer» B. Cytoplasm

Discussion

16.	Which of the following bases is present in RNA in place of thymine [CPMT 1986; Orissa JEE 2004]
A.	Uracil
B.	Adenine
C.	Guanine
D.	Water
Answer» B. Adenine

Discussion

17.	Which of the cell organelles are devoid of deoxy ribonucleic acid [RPMT 1997]
A.	Mitochondria and nucleus
B.	Chloroplast and mitochondria
C.	Nucleus and chloroplast
D.	Lysosome and dictyosome
Answer» E.

Discussion

18.	Nucleoside is made up of [BHU 1995; Pb. PMT 2004]
A.	Sugar only
B.	Phosphate only
C.	Sugar and phosphate
D.	Sugar and base
Answer» E.

Discussion

19.	Hydrolysis of nucleic acid yields [AMU 1988]
A.	Only sugar
B.	Phosphoric acid only
C.	Nitrogenous base only
D.	All the above
Answer» E.

Discussion

20.	DNA is a polymer of [CPMT 1998; BVP 2000]
A.	Nucleotide
B.	Nucleoside
C.	Amino acids
D.	All of the above
Answer» B. Nucleoside

Discussion

21.	The similarity between DNA and RNA is that both are [KCET 1999]
A.	Double stranded
B.	Having similar sugars
C.	Polymers of nucleotides
D.	Having similar pyrimidines
Answer» D. Having similar pyrimidines

Discussion

22.	How many nucleotides are present in one turn of DNA helix [MP PMT 1999, 2000; Haryana PMT 2005]
A.	4 pairs
B.	8 pairs
C.	10 pairs
D.	9 pairs
Answer» D. 9 pairs

Discussion

23.	A nucleoside differs from a nucleotide in not having [MP PMT 1998; BVP 2002]
A.	Phosphate
B.	Sugar
C.	Phosphate and sugar
D.	Nitrogen base
Answer» B. Sugar

Discussion

24.	The strongest evidence that DNA is genetic material comes from
A.	That chromosomes are made up of DNA
B.	Transformation of bacterial cells
C.	That DNA is not present in the cytoplasm
D.	That DNA is present in the nucleus
Answer» C. That DNA is not present in the cytoplasm

Discussion

25.	Five nitrogen atoms are present in the ring of
A.	Uracil
B.	Guanine
C.	Cytosine
D.	Thymine
Answer» C. Cytosine

Discussion

26.	The nucleic acid base having two possible binding sites is [AIIMS 2004]
A.	Thymine
B.	Cytosine
C.	Guanine
D.	Adenine
Answer» E.

Discussion

27.	The length of DNA having 23 base pairs is [Kerala PMT 2004]
A.	\[\text{70}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
B.	\[\text{78}\text{.4}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
C.	\[\text{78}\text{.2}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
D.	\[\text{74}\text{.8}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
E.	\[\text{74}\text{.2}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
Answer» E. \[\text{74}\text{.2}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

Discussion

28.	Ultraviolet light absorbed by nucleic acid is [RPMT 2000]
A.	26 nm
B.	75 nm
C.	260 nm
D.	1500 nm
Answer» B. 75 nm

Discussion

29.	Which one of the following pairs is not correctly matched [MP PMT 1993]
A.	Recombinant DNA DNA formed by the joining of segments of DNA from different sources
B.	Purine Nitrogenous bases Cytosine, thymine and uracil
C.	ATP The principal energy carrying compound in the cell
D.	r-RNA RNA molecules found in ribosomes
Answer» C. ATP The principal energy carrying compound in the cell

Discussion

30.	DNA was first discovered by [CPMT 1979, 94; BHU 1985]
A.	Beadle and Tatum
B.	Watson and Crick
C.	Friedrich Miescher
D.	Kornberg
Answer» D. Kornberg

Discussion

31.	Which of the following is capable of self-replication [CPMT 1988]
A.	An enzyme
B.	A carbohydrate molecule
C.	A water molecule
D.	A nucleic acid
Answer» E.

Discussion

32.	Purines are
A.	Single ring compounds
B.	Double ring compounds
C.	Straight chain compounds
D.	None of the above
Answer» C. Straight chain compounds

Discussion

33.	Pentose sugar present in nucleic acid is
A.	Ribulose
B.	Ribose
C.	Raffinose
D.	Xylulose
Answer» C. Raffinose

Discussion

34.	The transformation experiments on Pneumococcus showed that [CPMT 1988]
A.	DNA can duplicate itself
B.	RNA is the genetic material
C.	DNA is the genetic material
D.	None of these
Answer» D. None of these

Discussion

35.	DNA is not found in [CPMT 1987]
A.	Chromatin
B.	Nucleus
C.	Nucleolus
D.	Cytoplasm
Answer» D. Cytoplasm

Discussion

36.	In DNA molecule, which of the following base pair is present [MP PMT 1992; CPMT 1991; BHU 1980]
A.	Cytosine and adenine
B.	Adenine and thymine
C.	Adenine and guanine
D.	Cytosine and thymine
Answer» C. Adenine and guanine

Discussion

37.	Nucleic acids were discovered by [MP PMT 1999]
A.	Watson and Crick
B.	Khorana
C.	Wilkins
D.	Miescher
Answer» E.

Discussion

38.	DNA is present in [MP PMT 1995, 98; BVP 2000; RPMT 2001; MHCET 2001]
A.	Nucleus only
B.	Mitochondrion only
C.	Chloroplast only
D.	All the above
Answer» E.

Discussion

39.	The function of histone proteins of nuclei is
A.	To provide amino acids for enzyme synthesis
B.	To provide structural proteins for stabilising chromosome structure
C.	To neutralise anionic charges of inter nucleotide phosphate in DNA
D.	Both (b) and (c)
Answer» E.

Discussion

40.	Pyrimidines are
A.	Single ring compounds
B.	Double ring compounds
C.	Three ring compounds
D.	None of the above
Answer» B. Double ring compounds

Discussion

41.	DNA strands are antiparallel because of the presence of [Kerala PMT 2004]
A.	H-bonds
B.	Peptide bonds
C.	Disulfied bonds
D.	Phosphate-diester bonds None of the above
Answer» B. Peptide bonds

Discussion

42.	DNA is not present in one of the following [DPMT 1983; MP PMT 2003]
A.	Mitochondria
B.	Chloroplast
C.	Bacteriophage
D.	Tobacco mosaic virus
Answer» E.

Discussion

43.	In DNA guanine pairs with [CPMT 1980; AFMC 1988]
A.	Cytosine
B.	Thymine
C.	Uracil
D.	Adenine
Answer» B. Thymine

Discussion

44.	A DNA strand is directly involved in the synthesis of following except
A.	Another DNA
B.	Protein synthesis
C.	tRNA molecule
D.	mRNA molecule
Answer» C. tRNA molecule

Discussion

45.	Strands of DNA are bonded by [CPMT 1980; AIIMS 1989; Bihar MDAT 1992]
A.	Hydrogen
B.	Carbon
C.	Oxygen
D.	Nitrogen
Answer» B. Carbon

Discussion

46.	DNA is concentrated in [CPMT 1979, 86]
A.	Chromatin as DNA protein complex
B.	Ribosomes
C.	Golgi bodies
D.	Plastids
Answer» B. Ribosomes

Discussion

47.	Who proved that DNA is a genetic material
A.	Jacob and Monad
B.	Avery, Mcleod and McCarthy
C.	Griffith
D.	Harshey and Chase
Answer» D. Harshey and Chase

Discussion

48.	Which form of RNA has a structure resembling clover leaf [CBSE PMT 2004]
A.	RNA
B.	RNA
C.	\[r\]RNA
D.	\[hn\] RNA
Answer» C. \[r\]RNA

Discussion

49.	During replication of a bacterial chromosome DNA synthesis starts from a replication origin site and [CBSE PMT 2004]
A.	Moves in one direction of the site
B.	Moves in bi-directional way
C.	RNA primers are involved
D.	Is facilitated by tolemerase
Answer» C. RNA primers are involved

Discussion

50.	During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG; then the nucleotide sequence in the mRNA would be [CBSE PMT 2004]
A.	UAUGC
B.	UATGC
C.	TATGC
D.	TCTGG
Answer» B. UATGC

Discussion

Explore topic-wise MCQs in Testing Subject.

The role of nucleus in regulating the morphology of plant was discovered in [DPMT 1982; MHCET 2001]

Cell which does not contain nuclear membrane

True nucleus is absent in [CPMT 1987]

Nucleus is absent in

The structure of nuclear membrane facilitates [CPMT 1985, 2002]

Histone proteins found in nuclei of eukaryotes are [CPMT 2000]

Pars amorpha is associated with [CMC Vellore 1994]

Nucleoli are rich in [CPMT 1982; CBSE PMT 1993; BHU 2001; MP PMT 2003]

The "master mind'' of the cell is

Watson has calculated the nuclear pores of the mammalian cells to be ...... of the total surface area of the nucleus

ATP is [BVP 2002]

ATP is [Orissa PMT 2002]

Which of the following is a purine [MP PMT 1999]

DNA differs from RNA [BHU 2003]

RNA is absent in [BHU 1980; MP PMT 1986; MHCET 2003]

Which of the following bases is present in RNA in place of thymine [CPMT 1986; Orissa JEE 2004]

Which of the cell organelles are devoid of deoxy ribonucleic acid [RPMT 1997]

Nucleoside is made up of [BHU 1995; Pb. PMT 2004]

Hydrolysis of nucleic acid yields [AMU 1988]

DNA is a polymer of [CPMT 1998; BVP 2000]

The similarity between DNA and RNA is that both are [KCET 1999]

How many nucleotides are present in one turn of DNA helix [MP PMT 1999, 2000; Haryana PMT 2005]

A nucleoside differs from a nucleotide in not having [MP PMT 1998; BVP 2002]

The strongest evidence that DNA is genetic material comes from

Five nitrogen atoms are present in the ring of

The nucleic acid base having two possible binding sites is [AIIMS 2004]

The length of DNA having 23 base pairs is [Kerala PMT 2004]

Ultraviolet light absorbed by nucleic acid is [RPMT 2000]

Which one of the following pairs is not correctly matched [MP PMT 1993]

DNA was first discovered by [CPMT 1979, 94; BHU 1985]

Which of the following is capable of self-replication [CPMT 1988]

Purines are

Pentose sugar present in nucleic acid is

The transformation experiments on Pneumococcus showed that [CPMT 1988]

DNA is not found in [CPMT 1987]

In DNA molecule, which of the following base pair is present [MP PMT 1992; CPMT 1991; BHU 1980]

Nucleic acids were discovered by [MP PMT 1999]

DNA is present in [MP PMT 1995, 98; BVP 2000; RPMT 2001; MHCET 2001]

The function of histone proteins of nuclei is

Pyrimidines are

DNA strands are antiparallel because of the presence of [Kerala PMT 2004]

DNA is not present in one of the following [DPMT 1983; MP PMT 2003]

In DNA guanine pairs with [CPMT 1980; AFMC 1988]

A DNA strand is directly involved in the synthesis of following except

Strands of DNA are bonded by [CPMT 1980; AIIMS 1989; Bihar MDAT 1992]

DNA is concentrated in [CPMT 1979, 86]

Who proved that DNA is a genetic material

Which form of RNA has a structure resembling clover leaf [CBSE PMT 2004]

During replication of a bacterial chromosome DNA synthesis starts from a replication origin site and [CBSE PMT 2004]

During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG; then the nucleotide sequence in the mRNA would be [CBSE PMT 2004]