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Test: Biology - 5


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Test: Biology - 5 for NEET 2022 is part of NEET Mock Test Series preparation. The Test: Biology - 5 questions and answers have been prepared according to the NEET exam syllabus.The Test: Biology - 5 MCQs are made for NEET 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Biology - 5 below.
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Test: Biology - 5 - Question 1

Precocious Reproductive Development late in the growing Seasons-can be prevent by

Detailed Solution for Test: Biology - 5 - Question 1
1.The positive effect of the low temperature treatment on the vernaliztaion of the plants can be counteracted by subsequent high temperature treatment. This is called as devernalization. 
2. The degree of devernalization decreases if the duration of the cold treatment has been longer. 
However, the devernalized plant can again be vernalized by subsequent low temperature treatment.
Test: Biology - 5 - Question 2

What would be expected to happen if rotten fruit get mixed with unripen fruit

Test: Biology - 5 - Question 3

If any student x-wants to “bolt” a rossette plant, which one plant hormone expected to choose by that student for “bolting”

Test: Biology - 5 - Question 4
The most widely used compound as source of ethylene is
Test: Biology - 5 - Question 5
Hedge-making” Hormone is
Test: Biology - 5 - Question 6
“Lt = L0 rt” expression Represent the
Test: Biology - 5 - Question 7
Agent orange is
Test: Biology - 5 - Question 8
Gibberellins bring about
Test: Biology - 5 - Question 9
Antigibberrellin is
Test: Biology - 5 - Question 10
Size of graps increases in application of
Test: Biology - 5 - Question 11
Gibberellins were first isolated from a fungus Gibberella fugikuroi by
Test: Biology - 5 - Question 12
Bakane disease is associated with the discovery of
Test: Biology - 5 - Question 13
Cytokinins are mostly
Test: Biology - 5 - Question 14
Richmond-Long effect deals with
Test: Biology - 5 - Question 15
Which combination of gases suitable for fruit ripening
Detailed Solution for Test: Biology - 5 - Question 15 Ethylene is a gaseous hormone which promotes ripening of fruits. Methionine amino acid is precursor molecule for ethylene synthesis. Ethylene synthesis takes place in all parts of a plant such as roots, stems, leaves, fruits, seeds, etc. CORRECT OPTION IS (B).
Test: Biology - 5 - Question 16
It is seen if green a bananas are sealed and stored they remain so for a long time but if they are kept with a ripe apple they ripen, why?
Test: Biology - 5 - Question 17
During drought condition plant produces a hormone known as
Test: Biology - 5 - Question 18
In Kranz anatomy” bundle sheath cells
Test: Biology - 5 - Question 19
I.A.A. stands for
Test: Biology - 5 - Question 20
Auxanometer is required for
Test: Biology - 5 - Question 21
Apical dominance is
Test: Biology - 5 - Question 22
Movement of auxin is
Test: Biology - 5 - Question 23
Citrate,which is oxygenated in the  position,is converted to -ketoglutarate, which is oxygenated in theposition.The enzymes that effect this change are
Test: Biology - 5 - Question 24
The role of   ions in the hexokinase reaction is to
Test: Biology - 5 - Question 25
Conversion of glucose-6-phosphate to fructose-1, 6-bisphosphate requires
Test: Biology - 5 - Question 26
The importance of the pentose-phosphate pathway relative to that of glycolysis may be estimated from
Test: Biology - 5 - Question 27
Which one is absent inhuman Erythrocytes?
Test: Biology - 5 - Question 28
What is the first step in glycolysis ?
Test: Biology - 5 - Question 29

Phenyl mercuric acetate (PMA) results in

Detailed Solution for Test: Biology - 5 - Question 29

Phenyl mercuric acetate (PMA) results in reduced transpiration. PMA is an antitranspirant. These are some chemicals whose limited application on the leaf surface reduce or checks transpiration. A good antitranpirant increases leaf resistance but does not affect the mesophyll resistance.

Test: Biology - 5 - Question 30
When carboxyl group of pyruvic acid is removed the latter becomes
Test: Biology - 5 - Question 31
-Ketoglutarate” - is 
Test: Biology - 5 - Question 32
 cycle aslo called as
Test: Biology - 5 - Question 33
Chlorophyll a consist of
Test: Biology - 5 - Question 34
PS-II inhibited by
Test: Biology - 5 - Question 35
Key product of glycolysis metabolism is
Test: Biology - 5 - Question 36
Respiratory path way in living cell better to consider
Test: Biology - 5 - Question 37

Major limiting factor for photosynthesis is

Test: Biology - 5 - Question 38

In C2 cycle there is synthesis of

Test: Biology - 5 - Question 39

In “Calvin Cycle” -

Detailed Solution for Test: Biology - 5 - Question 39

In Calvin cycle, we can see that about 6 molecules of carbon dioxide, 18 molecules of ATP, and about 12 molecules of NADPH are utilized and on the other side about 1 molecule of glucose, 18 molecules of ADP and 12 molecules of NADP are generated.

Test: Biology - 5 - Question 40
Connecting link between Respiration& Photosynthesis is
Test: Biology - 5 - Question 41
All the cells of a plants are decendent of the
Test: Biology - 5 - Question 42

Sigmoid growth curve best suited to

Detailed Solution for Test: Biology - 5 - Question 42

Sigmoid growth curve

It is an S-shaped graph produced on plotting growth of living organisms in their natural environment against time. This curve is divided into three phases: lag phase, log phase or exponential phase of rapid growth, and stationary phase.

Exponential growth can be expressed as:

W1 = W0 e^rt

where,

W1 = Final size

W0 = Initial size

r = Growth rate

t = Time of growth

e = Base of natural logarithms

Test: Biology - 5 - Question 43
PR-Promote flowering
Test: Biology - 5 - Question 44

Antagonastic to ABA is

Test: Biology - 5 - Question 45
Phytochrome - exist in
Test: Biology - 5 - Question 46
DNA replication occurs in 5` 3` direction because 
Test: Biology - 5 - Question 47
Amino acid sequence in protein synthesis is determined by sequence of
Test: Biology - 5 - Question 48
During transcription, heloenzyme RNA polymerase binds to DNA sequence and DNA assumes a saddle like structure at that point. The sequence is called
Test: Biology - 5 - Question 49
Mode of DNA replication in Escherichia coli is
Test: Biology - 5 - Question 50
DNA repair is carried out by
Test: Biology - 5 - Question 51
During transcription, RNA polymerase binds to DNA site
Test: Biology - 5 - Question 52
What is correct
Test: Biology - 5 - Question 53
What happened when heat killed S-cells along with live R-cells were injected into mice
Detailed Solution for Test: Biology - 5 - Question 53 Griffith injected mice with live strain R bacteria. The mice were found healthy and contained no living bacteria. However, when he injected the mice with the S strain, the mice died and Griffith found live S cells in their bodies. He then injected the mice with heat-killed S bacteria.
Test: Biology - 5 - Question 54
Okazaki fragment are joined by enzyme
Test: Biology - 5 - Question 55
A point mutation comprising substitution of purine with pyrimidine is
Test: Biology - 5 - Question 56
Evolution was termed RNA world due to discovery of
Test: Biology - 5 - Question 57
Gene and cistron are sometimes used as synonyms because
Test: Biology - 5 - Question 58
mRNA is synthesised over DNA template in direction
Test: Biology - 5 - Question 59
RNA polymerase I catalyst synthesis of
Test: Biology - 5 - Question 60
During replication of DNA
Test: Biology - 5 - Question 61
In DNA replication, the leading strands is the one which replicates in
Test: Biology - 5 - Question 62
Intron is part of DNA which
Test: Biology - 5 - Question 63
In a DNA molecule cytosine is 18% Percentage of adenine would be
Test: Biology - 5 - Question 64
Double chained DNA strand is made radioactive in both its chains. It is allowed to replicate twice in non-radioactive medium. The result would be
Test: Biology - 5 - Question 65
DNA sequence of ATTCGATG is transcribed as
Test: Biology - 5 - Question 66
Reverse transcriptase is
Test: Biology - 5 - Question 67
During DNA replication, the strands sperate by
Test: Biology - 5 - Question 68
Termination of polypeptide chain is brought about by
Test: Biology - 5 - Question 69
Functional unit of gene that specifics synthesis of one polypeptide is
Test: Biology - 5 - Question 70

The two strands of DNA are held together by

Detailed Solution for Test: Biology - 5 - Question 70

Answer is option D i.e. "Hydrogen bonds"

The hydrogen bonds are formed between the base pairs of the anti-parallel strands. Base pairs are the building blocks of the DNA double helix. Base pairs consists of two nucleotide bases bound to each other by hydrogen bonds. The DNA helix is stable because of the base pairs that stack over one another and hydrogen bonds that hold the bases together.

Hence, answer is "Hydrogen bonds"

Test: Biology - 5 - Question 71
DNA having labelled thymidine is allowed to replicate in medium having non-radioactive thymidine. After three duplication, the DNA molecules having labelled thymidine shall be
Test: Biology - 5 - Question 72
New strands formation on a DNA template can be initiated only by
Test: Biology - 5 - Question 73
What is ture about ori
Test: Biology - 5 - Question 74
Solenoid is a structure of
Test: Biology - 5 - Question 75
Phenylketonuria, Huntington’s disease and sickle cell anaemia are caused by disorders associated with chromosomes
Test: Biology - 5 - Question 76
A woman with normal vision but with colour blind father colour blind father marries a colour blind man. The fourth child of the couple is a boy. This boy
Test: Biology - 5 - Question 77
A sudden spontaneous change in structure and action of a gene is called
Test: Biology - 5 - Question 78
Chromosomal doubling for producing polyploid plants is carried out by
Test: Biology - 5 - Question 79
Mode of inheritance of haemophilia resembles that of
Test: Biology - 5 - Question 80
In Melandrium, sex determination is of
Test: Biology - 5 - Question 81
Ishiara charts are used by opthalamologists for detecting
Test: Biology - 5 - Question 82
Polydactyly in man is due to
Test: Biology - 5 - Question 83
Hypertrichosis (hairy pinnae) is trait linked to
Test: Biology - 5 - Question 84
Euploidy is
Test: Biology - 5 - Question 85
In Drosophila, white eye colour is recessive X-linked trait while red eye colour is dominant. A white eyed female is crossed with red eyed male. The female offspring with red eye colour would be
Test: Biology - 5 - Question 86
Nucleosome core is made of 
Test: Biology - 5 - Question 87
In which of the following animal animal, the milk is squirted down the throat of the baby by muscular contraction of mother ?
Test: Biology - 5 - Question 88
Which of the following pair belong to category of cold blooded animals ?
Test: Biology - 5 - Question 89
The largest and heaviest mammals in the world is
Test: Biology - 5 - Question 90

Anus in vertebrates opens into a central chamber called as

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