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SRMJEEE Biology Mock Test - 2 - JEE MCQ


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30 Questions MCQ Test - SRMJEEE Biology Mock Test - 2

SRMJEEE Biology Mock Test - 2 for JEE 2024 is part of JEE preparation. The SRMJEEE Biology Mock Test - 2 questions and answers have been prepared according to the JEE exam syllabus.The SRMJEEE Biology Mock Test - 2 MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for SRMJEEE Biology Mock Test - 2 below.
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SRMJEEE Biology Mock Test - 2 - Question 1

Leaves possess thick cuticle in plants of

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 1
A plant cuticle is a protecting film covering the epidermis of leaves, young shoots and other aerial plant organs without periderm. It consists of lipid and hydrocarbon polymers impregnated with wax, and is synthesized exclusively by the epidermal cells.
SRMJEEE Biology Mock Test - 2 - Question 2

Which endangered animal is the source of world's finest, lightest, warmest and most expensive wool i.e. the shahtoosh?

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 2

Chiru or the Tibetan antelope (Pantholops hodgsoni) is medium-sized bovid, which is about 1.2 m in height. It's coat is grey to reddish brown, with a white underside. The Chiru’s wool, known as shahtoosh, is worm, soft and fine. Shahtoosh is very warmest, lightest and most expensive wool. The wool can only be obtained by killing the animal. It is listed as endangered by the world conservation union and the 'United States Fish and Wildlife Service' due to commercial poaching for its wool. 

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SRMJEEE Biology Mock Test - 2 - Question 3

Which of the following is a medicinal plant?

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 3

Extracts of Aconitum species have been given orally in traditional medicine to reduce fever associated with colds, pneumonia, laryngitis, croup, and asthma; for pain, inflammation, and high blood pressure; as a diuretic; to cause sweating; to slow heart rate; and for sedation.

 

SRMJEEE Biology Mock Test - 2 - Question 4

'Valley of Flowers is' found in

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 4

Valley of Flowers National Park is an Indian national park, located in North Chamoli, and  in the West Himalayas in the state of Uttarakhand and is known for its meadows of endemic alpine flowers and the variety of flora.

SRMJEEE Biology Mock Test - 2 - Question 5

Mode of inheritance of haemophilia resembles that of

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 5

Both haemophilia and colour blindness skips generations; the unaffected parents have diseased progeny which means that the traits are present in recessive condition in parents. Males are more affected than females which means that traits are dependent on sex of individual; both are sex linked traits. Colour blindness and haemophilia are X-linked recessive disorders. One copy of the affected gene in males in each cell is sufficient to cause the disorder (XcY or XhY ). Females with two copies of the affected gene show the disorder (XcXc or XhXh). The heterozygous females serve as the carrier for the disease. 

SRMJEEE Biology Mock Test - 2 - Question 6

Red blood cells survive around _____ days.

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 6

A unit of red blood cells (RBCs) expires in 35 or 42 days because of the type of anticoagulant in the bag. But in real life RBCs live about 120 days (except for Scarlett O'Negative, she's immortal)

SRMJEEE Biology Mock Test - 2 - Question 7

Intra-uterine devices (IUDs) are used to prevent :

SRMJEEE Biology Mock Test - 2 - Question 8

Hardest part of tooth is

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 8

Enamel is the hardest part of not only tooth but even of the body. It’s harder than bones.

Enamel is a dead tissue as its forming cells Ameloblasts retract away from the surface after laying down it. That’s why it lacks the quality to heal, remodel or repair.

SRMJEEE Biology Mock Test - 2 - Question 9

The sheep 'Dolly' was created by:

SRMJEEE Biology Mock Test - 2 - Question 10

India is the lone producer of:

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 10
It accounted 10.84% of the total Muga Silk produced in India during the year. Production of Muga Silk in Nagaland was 2 metric tonne during 2015-16. It accounted 1.2% of the total Muga Silk produced in India during the year.
SRMJEEE Biology Mock Test - 2 - Question 11

The fossil of Sinathropus pekinensis has been discovered in which of the epoch?

SRMJEEE Biology Mock Test - 2 - Question 12

Meroblastic cleavage is :

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 12

Meroblastic cleavage is a type of cleavage that occurs in very yolky eggs like birds in which the egg cytoplasm and not the yolk divides (incomplete division). There are two types of meroblastic cleavage  discoidal and superficial. Discoidal usually occurs in birds, reptiles, fishes etc. which have telolecithal eggs and superficial cleavage occurs in insects which have centrolecithal eggs. 

SRMJEEE Biology Mock Test - 2 - Question 13

Nucleotide base present in DNA and not in RNA is

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 13

RNA contains all the bases of DNA except thymine.
Instead of thymine, Uracil is present in RNA.
So, bases present in RNA are adenine, guanine cytosine and uracil.

SRMJEEE Biology Mock Test - 2 - Question 14

Rapid growth of blastodermic vesicle is facilitated by :

SRMJEEE Biology Mock Test - 2 - Question 15

Repressor binds to operator of lac operon when

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 15

In presence of lactose, allolactose; an isomer of lactose binds to the repressor and causes an allosteric shift. The altered repressor cannot bind to the operator, allowing RNA polymerase to transcribe the lac genes. The repressor, encoded by the regulator gene, bind to the operator region which is located just upstream the binding site of the RNA polymerase and hence, prevent the binding of the RNA polymerase and transcription of structural genes is turned off. The lac Z, lacY and lac A genes in lac operon are the structural genes that code for β-galactosidase (converts lactose into glucose and galactose), β-galactoside permease (transports lactose into the cell) and β-galactoside transacetylase respectively. Binding of the repressor to RNA polymerase turns the gene expression off and hence, none of the above-mentioned enzymes are synthesized.

Thus, the correct answer is option D.

SRMJEEE Biology Mock Test - 2 - Question 16

Endonuclease is employed in

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 16

Endonucleases are enzymes that cleave the phosphodiester bond within a polynucleotide chain. Some, such as deoxyribonuclease I, cut DNA relatively nonspecifically (without regard to sequence), while many, typically called restriction endonucleases or restriction enzymes, cleave only at very specific nucleotide sequences. These enzymes are often used in genetic engineering to make recombinant DNA for introduction into bacterial, plant, or animal cells, as well as in synthetic biology

SRMJEEE Biology Mock Test - 2 - Question 17

Gene recombinations are due to

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 17

Another feature of of independent assortment is recombination. Recombination occurs during meiosis and is a process that breaks and recombines pieces of DNA to produce new combinations of genes.

SRMJEEE Biology Mock Test - 2 - Question 18

The genetic ratio of 9:3:3:1 is due to :

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 18

9:3:3:1 is the phenotypic ratio obtained in the F2 generation of a dihybrid cross. Where the values 9 and 1 represent parental phenotypes, the other two values represent new combination. This is because of independent assortment of alleles belonging to the characters considered in the cross.

SRMJEEE Biology Mock Test - 2 - Question 19

Ductus reuniens connects

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 19

The ductus reuniens also the canalis reuniens of Hensen is part of the human inner ear. It connects the lower part of the saccule to the cochlear duct near its vestibular extremity.

SRMJEEE Biology Mock Test - 2 - Question 20

Involuntary muscular contraction is called

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 20

The Involuntary muscular could traction of a group of muscle fibres or heart is called as muscle spasm.
It is mainly caused due to overuse I mean over working,muscle fatigue (making us slow and causing pain while doing exercise for longer time),dehydration and electrolyte abnormalities.

SRMJEEE Biology Mock Test - 2 - Question 21

The muscle fatigue occurs due to accumulation of

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 21

Muscle fatigue is caused due to accumulation of lactic acid in them. This occurs because of the need for high energy, fluctuation of energy need and insufficient supply of oxygen. Higher level of lactic acid can cause pain in the muscles.

SRMJEEE Biology Mock Test - 2 - Question 22

Using the information below, what is the correct order for the transmission of an impulse across a synapse? 1. Calcium interacts with proteins. 2. Vesicles fuse with synaptic membrane. 3. Neurotransmitter diffuses into synaptic cleft. 4. Receptor sites are occupied.

SRMJEEE Biology Mock Test - 2 - Question 23

Energy change in photosynthesis is

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 23

Photosynthesis in plants converts solar energy into chemical energy using electrons and protons from water. The process of photosynthesis in plants involves a series of steps and reactions that use solar energy, water, and carbon dioxide to produce organic compounds and oxygen.

SRMJEEE Biology Mock Test - 2 - Question 24

Which is the most advanced theory of origin of life?

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 24
  • The Haldane and Oparin theory, proposed by scientists Alexander Oparin and J.B.S. Haldane, suggests that life originated from simple organic compounds in a primordial soup.
  • They believed that under early Earth conditions, chemical reactions led to the formation of complex molecules, eventually resulting in the first living organisms.
  • This theory emphasizes the role of natural processes and environmental conditions in the origin of life, making it one of the most recognized and advanced theories.
SRMJEEE Biology Mock Test - 2 - Question 25

Which is not caused by deficiency of mineral nutrition?

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 25

Mineral nutrition of plants includes various diseases and disorders like chlorosis, stunted plant growth, premature leaves abscission, internode shortening, cell division inhibition. Etiolation is seen in flowering plants when they are grown in partial or complete absence of light. They have pale yellow leaves and long internodes.

Thus, the correct answer is option D.

SRMJEEE Biology Mock Test - 2 - Question 26

Tracheids, tracheae, wood fibres and wood parenchyma occur in

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 26

The xylem is the principal water-conducting tissue of vascular plants. It consists of tracheary elements, tracheids and wood vessels and of additional xylem fibres. Bordered pits are typical for tracheids, while wood vessels are marked by perforated or completely dissolved final walls. The principal conductive cells of the xylem are tracheary elements, of which there are two types, tracheids and wood vessels. 

SRMJEEE Biology Mock Test - 2 - Question 27

Acid rain is due to the pollution of

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 27

Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids. Some governments have made efforts since the 1970s to reduce the release of sulfur dioxide and nitrogen oxide into the atmosphere with positive results.

SRMJEEE Biology Mock Test - 2 - Question 28

Testosterone is produced in the

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 28

 Option ( b)... Interstitial cells is the correct answer. 

 

The interstitial cells are found adjacent to seminiferous tubules in testicle. They produce testosterone in presence of (LH) luteinizing hormone.

SRMJEEE Biology Mock Test - 2 - Question 29

Positive feedback controls the secretion of which of the following hormones?

Detailed Solution for SRMJEEE Biology Mock Test - 2 - Question 29
 Explanation: Contraction of the uterus during childbirth causes the release of oxytocin, which stimulates stronger contractions of the uterus, causing more oxytocin release. This perpetual cycle results in a positive feedback response.
SRMJEEE Biology Mock Test - 2 - Question 30

Fermentation is accompanied by

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