Biology Test 57

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Biology Test 57

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Question 1/25
1 / -0

Directions For Questions

20

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How many different kinds of amino acids are specified by the genetic code ?

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A
11

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B
13

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C
230

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D
20

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Solutions
20
Question 2/25
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Directions For Questions

linkage

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Mendel found certain traits not ti assort independently. It is due to

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A
dominance

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B
linkage

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C
crossing over

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D
amitosis

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Solutions
linkage
Question 3/25
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Directions For Questions

Safflower

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Oil which has maximum percentage of Polyunsaturated fatty acids is of.

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A
Coconut

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B
Soyabean

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C
Safflower

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D
Walnut

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Solutions
Safflower
Question 4/25
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Directions For Questions

Affected individual has early ageing

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Which one among the following is not correct about Down\'s syndrome?

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A
It is genetic disorder

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B
Affected individual has early ageing

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C
Affected person has mental retardation

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D
Affected person has furrowed tongue with open mouth

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Solutions
Affected individual has early ageing
Question 5/25
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Directions For Questions

Iodine

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Goitre or abnormal enlargement of the the thyroid gland is caused by the deficiency of _________ .

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A
Iron

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B
Iodine

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C
Potassium

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D
Magnesium

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Solutions
Iodine
Question 6/25
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Directions For Questions

Hemophilia

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A hereditary disease in which the blood does not clot and the affected person may bleed to death even from a small cut, is called

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A
Hemophilia

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B
Royal disease

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C
Leukemia

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D
Bleeder\'s disease

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Solutions
Hemophilia
Question 7/25
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Directions For Questions

Complementarity of the two strands

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Which of the following features of DNA makes it uniquely suited to store and transmit genetic information from generation to generation ?

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A
Complementarity of the two strands

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B
Double helix

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C
Number of base-pairs per turn

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D
Sugar-phosphate backbone

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Solutions
Complementarity of the two strands
Question 8/25
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Directions For Questions

Ga

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Which of the following elements is a metal?

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A
s

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B
Ga

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C
I

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D
Se

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Solutions
Ga
Question 9/25
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Directions For Questions

GACUAUCG

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DNA tempalte sequence of CTGATAGC is transcribed over mRNA as

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A
GUCTUTCG

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B
GACUAUCG

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C
GAUTATUG

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D
UACTATCU

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Solutions
GACUAUCG
Question 10/25
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Directions For Questions

reduce transpiration

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In dry regions, the leaf size of a tree becomes smaller. It is so to ?

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A
reduce transpiration

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B
reduce metabolism maintain natural growth

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C
maintain natural growth

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D
protect plant from animals

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Solutions
reduce transpiration
Question 11/25
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Directions For Questions

Endoplasmic reticulum and Ribosome

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Which of the following cell organelles play the most significant role in protein synthesis ?

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A
Lysosome and Centrosome

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B
Endoplasmic reticulum and Ribosome

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C
Golgi apparatus and Mitochondra

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D
Lysosome and Mitochondra

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Solutions
Endoplasmic reticulum and Ribosome
Question 12/25
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Directions For Questions

1,2,3 and 4

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Which of the following elements are present in all proteins ? 1. Carbon 2. Hydrogen 3. Oxygen 4. Nitrogen

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A
2 and 3

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B
1,2 and 4

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C
1,3 and 4

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D
1,2,3 and 4

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Solutions
1,2,3 and 4
Question 13/25
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Directions For Questions

mRNA

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Transcription involves synthesis of

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A
DNA

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B
tRNA

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C
mRNA

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D
rRNA

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Solutions
mRNA
Question 14/25
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Directions For Questions

Plasma membrane

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Which among the following cell organelles is semi-permeable?

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A
Cell membrane

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B
Plasma membrane

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C
Cell wall

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D
Nucleus

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Solutions
Plasma membrane
Question 15/25
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Directions For Questions

Single stranded

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A DNA with unequal nitrogen bases would most probably be

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A
Single stranded

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B
Double stranded

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C
Triple stranded

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D
Four stranded

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Solutions
Single stranded
Question 16/25
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Directions For Questions

lay eggs

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Monotremes are unique mammals because they _______.

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A
lay eggs

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B
posses hair

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C
give birth to live young

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D
secret milk in a pouch

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Solutions
lay eggs
Question 17/25
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Directions For Questions

All echinoderms are viviparous

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Which one of the following statements is not correct ?

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A
All echinoderms are viviparous

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B
Roundworm has no circulatory system

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C
In bony fishes,swim bladder is usually present

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D
In cartilaginous fishes, fertilization is internal

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Solutions
All echinoderms are viviparous
Question 18/25
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Directions For Questions

Hydra

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Which of the following creatures has no blood but respires ?

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A
Fish

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B
Cow

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C
Hydra

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D
Cockroach

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Solutions
Hydra
Question 19/25
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Directions For Questions

X-ray crystallography

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Nuclcotide arrangement in DNA can be seen by?

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A
X-ray crystallography

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B
Electron microscope

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C
Ultracentrifuge

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D
Light microscope

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Solutions
X-ray crystallography
Question 20/25
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Directions For Questions

Salivary glands of vertebrates

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Poison glands of snakes are homologous to?

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A
Stings of rays

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B
Salivary glands of vertebrates

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C
Sebaceous glands of mammals

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D
Electric organs of fishes

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Solutions
Salivary glands of vertebrates
Question 21/25
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Directions For Questions

A-(2),B-(1),C-(4),D-(3)

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Match List-I with List-II and select the correct answer using the codes given below the lists : List-I List-II (Scientists ) (Achievement ) A. Arber and Smith 1. Developed transgenic plants with Agro-bacterium T- DNA B. Feldman 2. Discovered endonucleases C. Mullis 3. Discovered reverse transcriptase D. Temin and Baltimore 4. Discovered Polymerase chain reaction

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A
A-(2),B-(1),C-(4),D-(3)

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B
A-(1),B-(2),C-(4),D-(3)

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C
A-(2),B-(1),C-(3),D-(4)

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D
A-(1),B-(2),C-(3),D-(4)

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Solutions
A-(2),B-(1),C-(4),D-(3)
Question 22/25
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Directions For Questions

planting and conservation of avenue trees

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The name of Smt. Thimmakka is associated with the?

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A
planting and conservation of avenue trees

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B
Appiko’ movement

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C
conservationof fauna and flora of the western ghats

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D
agitations against hydroelectric project

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Solutions
planting and conservation of avenue trees
Question 23/25
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Directions For Questions

Escherichia coli

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Experimental material in the study of DNA replication has been?

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A
Escherichia coli

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B
Neurospora crassa

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C
Pneumococcus

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D
Drosophila melanogaster

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Solutions
Escherichia coli
Question 24/25
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Directions For Questions

Viroids consist of a single -stranded RNA molecule

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Which one of the following statements is correct ?

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A
Prions are the smallest free-living cells

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B
The cell wall of Mycoplasmas is made up of amino sugars

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C
Viroids consist of a single -stranded RNA molecule

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D
Rickettsias lack cell wall

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Solutions
Viroids consist of a single -stranded RNA molecule
Question 25/25
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Directions For Questions

1,2 and 4 are correct

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Consider the following statements: AIDS is transmitted 1. By sexual intercourse 2. By blood transfusion 3. By mosquitoes and other blood sucking insects. 4. Across the placenta Of these statements :

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A
1,2 and 3 are correct

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B
1,2 and 4 are correct

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C
1,3 and 4 are correct

Correct

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D
1 and 3 are correct

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Solutions
1,2 and 4 are correct

Question 1/25

11

13

230

20

Question 2/25

dominance

linkage

crossing over

amitosis

Question 3/25

Coconut

Soyabean

Safflower

Walnut

Question 4/25

It is genetic disorder

Affected individual has early ageing

Affected person has mental retardation

Affected person has furrowed tongue with open mouth

Question 5/25

Iron

Iodine

Potassium

Magnesium

Question 6/25

Hemophilia

Royal disease

Leukemia

Bleeder\'s disease

Question 7/25

Complementarity of the two strands

Double helix

Number of base-pairs per turn

Sugar-phosphate backbone

Question 8/25

s

Ga

I

Se

Question 9/25

GUCTUTCG

GACUAUCG

GAUTATUG

UACTATCU

Question 10/25

reduce transpiration

reduce metabolism maintain natural growth

maintain natural growth

protect plant from animals

Question 11/25

Lysosome and Centrosome

Endoplasmic reticulum and Ribosome

Golgi apparatus and Mitochondra

Lysosome and Mitochondra

Question 12/25

2 and 3

1,2 and 4

1,3 and 4

1,2,3 and 4

Question 13/25

DNA

tRNA

mRNA

rRNA

Question 14/25

Cell membrane

Plasma membrane

Cell wall

Nucleus

Question 15/25

Single stranded

Double stranded

Triple stranded

Four stranded

Question 16/25

lay eggs

posses hair

give birth to live young

secret milk in a pouch