Biology 10 Chapter 15 Challenge MCQs Test

In Biology 10 Chapter 15 Challenge MCQs Test, there are 75 MCQs. This test contains all the Chapter 15 MCQs of practice tests. So just do the practice of all the 5 MCQs Tests then come to do this test. All these MCQ tests are for Federal Board students.

Biology 10 Chapter 15 Challenge MCQs Test

Challenge MCQs Test

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Class 10 Biology
Chapter 15
Full Chapter Challenge Test

1 / 75

Variations selected for their transmission to next generation are;

None of these

Continuous

Discontinuous

Favourable

2 / 75

Dominant alleles are represented by _________ letter and recessive alleles by ____________ letters.

Lowercase, capital

Capital, capital

Capital, lowercase

Lower case, lowercase

3 / 75

An organism has two different alleles for a single trait. Its genotype Is said to be;

Heterozygous

Homozygous

Homologous

Hemizygous

4 / 75

It is the process by which the better genetic variations become more common In successive generations of population;

Artificial selection

Natural selection

Selective breeding

Variation

5 / 75

Who proposed the mechanism of organic evolution In 1838?

Charles Darwin

Gregor Mendel

Charles Lyll

Lamark

6 / 75

Chromatin is made up of:

Proteins

None of these

DNA+Protein

DNA

7 / 75

Among following, which Is the source of variations?

All of these

Crossing over

Gene flow

Mutation

8 / 75

It is a situation where in heterozygous genotypes, both the alleles express as a blend and neither allele Is dominant over the other;

Incomplete dominance

Co-dominance

Complete dominance

None of these

9 / 75

A purple-flowered pea plant has the genotype PP. Which of the following statements about this plant is FALSE?

When bred to a white-flowered plant, all offspring will be purple flowered

It has a homozygous dominant genotype

Its phenotype will be white flowers

All the gametes produced will have the same flower colour allele

10 / 75

Among following which Is an example of co-dominance?

Blood group AB

Blood group B

Blood group O

Blood group A

11 / 75

It is change in characteristics of a population or species of organisms over the course of generations;

Translation

Evolution

Transcription

Replication

12 / 75

What condenses Into a chromosome?

Nucleoplasm

Cytoplasm

Nucleolus

Chromatin material

13 / 75

Who developed fundamental Principles of genetics?

Charles Lyll

Gregor Mendel

Lamark

Charles Darwin

14 / 75

Which is favourable variation in moths after industrial revolution?

Light colour

None of these

Medium colour

Dark colour

15 / 75

An organism's expressed physical trait, such as seed colour or pod shape, is called its:

Phenotype

Karyotype

Genotype

Physical type

16 / 75

In artificial selection, bred plants are known as:

Cultivars

Varieties

Cultivars and varieties

Breeds

17 / 75

Which of the following statements regarding genes is FALSE?

Genes consist of a long sequence of DNA

A gene contains information for the production of a protein

Genes are located on chromosomes

Each cell contains a single copy of every gene

18 / 75

It is situation where two different alleles of a gene pair express themselves completely, instead of showing a dominant- recessive relationship is called;

None of these

Incomplete dominance

Complete dominance

Co-dominance

19 / 75

Ribosome reads the sequence of mRNA nucleotides and joins specific amino acids to form proteins. This step is known as;

Transcription

Replication

Combination

Translation

20 / 75

In which part of cell, transcription takes place?

Nucleus

Cytoplasm

Golgi Appartus

Ribosomes

21 / 75

Inside of double helix consists of:

Sugar-phosphate

Phosphate

Sugar

Nitrogenous bases

22 / 75

It is a condition in which normal body pigments are absent;

Sickle cell anaemia

Colour blindness

Diabetes

Albinism

23 / 75

Sequence of amino acids in a protein Is controlled by sequence of __________ In DNA.

Genes

Nucleotides

alleles

Loci

24 / 75

In 1953,_______ proposed the structure of DNA.

Francis Crick

James Watson

None of these

Both a and b

25 / 75

In the cross-pollination between a true-breeding yellow pod plant and a true-breeding green pod plant, where green pod colour is dominant, the resulting offsprings (F1 generation) will be:

1/4 yellow, 3/4 green

All yellow

All green

1/4 green, 3/4 yellow

26 / 75

Charles Darwin published a book "On the Origin of Species by means of Natural selection" In;

1870

1858

1869

1859

27 / 75

In which type of variation, the phenotypes show a complete range of measurements from one extreme to the other Is;

Discontinuous

Continuous

None of these

Both a and b

28 / 75

The possible number of chromosomal combinations are:

80 trillion

70 trillion

70 billion

70 millions

29 / 75

In ________ James Watson and Francis Crick proposed the structure of DNA.

1957

1951

1953

1955

30 / 75

Which is favourable variation in moths before Industrial revolution?

Light colour

Medium colour

None of these

Dark colour

31 / 75

Transmisslon of characteristics front parents to offsprings is called as;

Inheritance

Replication

Co-dominance

Mutation

32 / 75

The position of gene on chromosome is known as;

Genome

Genotype

Allele

Locus

33 / 75

Mendel's primary contribution to our understanding of inheritance was;

Determining that informations contained in DNA are for protein synthesis

The discovery of alleles

The idea that genes are found on chromosomes

Explanation of the patterns of inheritance

34 / 75

Charles Darwin proposed that organisms produce many more offspring than can possible survive on the limited amount of resources available to them. According to Darwin, the offspring that are most likely to survive are those that;

Have no natural predators

Are born first and grow fastest

Are largest and most aggressive

Are best adapted to the environment

35 / 75

mRNA is synthesized by:

DNA Polymerase

Ribosomes

RNA Ligase

RNA Polymerase

36 / 75

Pink Flowered Four O Clock plant is an example of;

None of these

Co-dominance

Complete dominance

Incomplete dominance

37 / 75

How many pairs of homologous chromosomes are there in human body cell?

46

22

23

40

38 / 75

A dominant allele only suppresses the expression of recessive allele it does not affect its:

Nature

Position

Length

Working

39 / 75

In which part of cell, transcription takes place?

Ribosome

Nucleus

Cytoplasm

Golgi Apparatus

40 / 75

How many types of differences shown by individuals of same species?

6

2

4

1

41 / 75

The Specific combinations of germs in an individual is known as;

Karyotype

Phenotype

Phenocopy

Genotype

42 / 75

Chromosomes carry units of Inheritance called as;

Chromatin

None of these

genes

DNA

43 / 75

Outside backbone of double helix is made up of:

Phosphate

Sugar-phosphate

None of these

Sugar

44 / 75

Physical appearance or colour of an organism is called:

Phenotype

Physical power

Karyotype

Genotype

45 / 75

A DNA molecule consists of ______ polynucleotide strands.

3

5

2

4

46 / 75

Feet size in Man Is an example of:

Continuous variations

Gene flow

Heredity variations

Discontinuous variations

47 / 75

The alternate forms of a gene are called as;

None of these

Genome

Genotype

Alleles

48 / 75

Which variations show distinct phenotypes and phenotypes of such variations cannot be measured?

Discontinuous variations

Continuous variations

Both a and b

None of these

49 / 75

DNA wraps around histone protein and forms rounded structures called as;

Nucleosomes

Ribosomes

Lysosomes

mRNA

50 / 75

Intentional breeding between individuals for certain traits, or combination of traits is called as:

Artificial selection

Natural selection

Evolution

Variations

51 / 75

Specific proteins have specific number and sequence of;

Enzymes

Amino Acids

Allele

Loci

52 / 75

Which component of cell Is Involved In translation?

Mitochondria

Ribosome

Nucleus

Golgi apparatus

53 / 75

Among following, which is the genotype of blood group O?

[katex]{ I }^{ B }i[/katex]

[katex]{ I }^{ A }i[/katex]

ii

[katex]{ I }^{ A }{ I }^{ B }[/katex]

54 / 75

Genes contain Instructions for the synthesis of;

Fats

Carbohydrates

Vitamins

Proteins

55 / 75

What will be the colour of flowers produced as a result of cross between red and white flowered 4'O Clock plants?

Purple

Red

Pink

White

56 / 75

Cytocine always pairs with;

Adenine

Thymine

Uracil

Guanine

57 / 75

How many hydrogen bonds are formed between cytosine and guanine?

3

2

4

1

58 / 75

Branch of biology that deals with the study of inheritance Is called as;

Natural selection

Histology

Artificial selection

Genetics

59 / 75

Specific sequence of DNA nucleotides is copied In the form of mRNA In a process:

Replication

Inheritance

Transcription

Translation

60 / 75

Mendel used __________ pea plants in his experiments

280000

2800000

2800

28000

61 / 75

What make the backbone of DNA molecule?

Phosphate + Deoxyribose

Deoxyribose

Phosphate

Nitrogenous bases

62 / 75

How many genetically different kinds of gametes an individual with genotype AAbb can produce?

2

4

8

1

63 / 75

Each trait studied in Pea plant had ___________ distinct form.

1

2

6

4

64 / 75

True breeding means:

None

Hetrozygous

Homozygous

Both homozygous and hetrozygous

65 / 75

Which of the following genes will be termed as Homozygous Recessive,

rryy

RrYY

RrYy

RRYY

66 / 75

Adenine always pairs with;

Guanine

Cytosine

Uracil

Thymine

67 / 75

What Is the Diploid (2n) number of humans?

26

23

46

16

68 / 75

Example of discontinuous variation is;

Intelligence

Blood group

None of these

Height in Man

69 / 75

__________________ gave the first hint at evolution?

R. C. Punnett

Lamarck

C.de Buffon

Charles Darwin

70 / 75

Copies of chromatids of chromosomes are made through the process called;

Inheritance

Translation

Replication

Transcription

71 / 75

Expression of genotype in the form of trait is:

Phenotype

Genome

Incomplete dominance

Complete dominance

72 / 75

Pisum sativum is scientific name of;

Pea plant

Onion

Frog

Mustard plant

73 / 75

How many hydrogen bonds are formed between adenine and thymine?

1

2

4

3

74 / 75

All living things had been created in their current form only a few thousand years ago. This Idea Is known as;

Evolution

Variations

Theory of special creation

None of these

75 / 75

The first filial generation Is denoted by

P2

F1

F2

P1

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