NEET Test 183

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NEET Test 183

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Weekly Quiz Competition

Question 1
4 / -1

A
3−amino−5−heptenoic acid

B
β−amino−δ

C
5−amino−2−heptenoic acid

D
5−amino-hex−2−enecarboxylic acid

Solution

As - COOH group is the highest priority group, it is numbered one.

So, the IUPAC name is 3−amino−5−heptanoic acid.
Question 2
4 / -1

Asexual reproduction is related to:

A
Amphimixis

B
Budding

C
vegetative propagation

D
Both (B) and (C)

Solution

Reproduction is the process of producing fertile offspring which look similar to parents. The sexual mode of reproduction is the reproductive process where two gametic cells fertilize or fuse to produce a zygote. In asexual reproduction, offspring is formed from a single parent without the formation of gametes. Sexual reproduction where gametes fuse to form a zygote is referred to as amphimixis.

Vegetative propagules are the plant parts or organs that are involved in the process of reproduction even though their primary function is not it. The reproductive process is called vegetative propagation as the nonreproductive parts/organs (leaf/stem/roots) are involved. It is a type of asexual reproduction.

In certain organisms, small buds are produced attached to the parent organism which grows and eventually separate to develop into a new organisms. This process is called budding and it is a type of asexual reproduction.
Question 3
4 / -1

The main area of various types of activities of a cell is:

A
plasma membrane

B
mitochondrion

C
cytoplasm

D
nucleus

Solution

The cytoplasm is a granular, crystallo-colloidal complex that forms the living protoplasm of a cell excluding its nucleus. It consists of proteins, nucleic acids, fats, carbohydrates, vitamins, minerals, waste metabolites, and all the organelles. It is the main area for various types of activities of cell-like respiration, nutrition, storage, etc.
Question 4
4 / -1

Which of the following pair is wrongly matched about the taxonomic arrangement of cat?

A
Scientific name - Felis domestica

B
Family - Felidae

C
Order - Mammalia

D
Phylum - Chordata

Solution

The cat is a small carnivorous mammal.

It is the only domesticated species in the family Felidae. It's Binomial name is Felis catus.

Scientific classification:-

Kingdom → Animalia

Phylum →Chordata

Family → Felidal

Class → Mammalia

Species →F.catus

Order → carnivores

Suborder → Feliformia

Subfamily → Felinae
Question 5
4 / -1

ABO blood groups in humans are controlled by the gene I. It has three alleles I_A, I_B and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?

A
Two

B
Three

C
One

D
Four

Solution

The three alleles in ABO blood groups in humans can produce six different genotypes and four different phenotypes.
Question 6
4 / -1

A string of length L is fixed at one end and carries a mass M at the other end. The string makes revolution per second around the vertical axis through the fixed end as shown in the figure, the tension in the string is:

A
ML

B
2ML

C
4ML

D
16ML

Solution
Question 7
4 / -1

Which of the following is an incorrect match?

A
Myasthenia gravis: Autoimmune disorder affecting neuromuscular junction leading to fatigue, weakening, and paralysis of skeletal muscle

B
Muscular dystrophy: Progressive degeneration of skeletal muscles, mostly due to genetic disorder

C
Arthritis: Rapid spasms (wild contractions) in muscles due to low Ca⁺⁺ in body fluid

D
Osteoporosis: Age-related disorder characterized by decreased bone mass and increased chances of fractures

Solution

Tetany is rapid spasms (wild contractions) in muscle due to low Ca⁺⁺ in body fluid. Tetany is a symptom characterized by muscle cramps, spasms or tremors. These repetitive actions of the muscles happen when your muscle contracts uncontrollably.

Arthritis is the swelling and tenderness of one or more of your joints. The main symptoms of arthritis are joint pain and stiffness, which typically worsen with age.
Question 8
4 / -1

Which of the following meristems appears early in the life of a plant and contributes to the formation of the primary plant body?

a. Apical meristem

b. Intercalary meristem

c. Lateral meristem

A
Only a

B
Only a and b

C
Only b

D
Only b and c

Solution

The apical meristem is the growth region in plants found within the root tips and the tips of the new shoots and leaves. Apical meristem is one of three types of meristem, or tissue that can differentiate into different cell types. Meristem is the tissue in which growth occurs in plants.

Intercalary meristem is a type of meristematic tissue associated with the growth in length in the middle position, thus the name. In particular, it is made up of meristematic cells that divide mitotically in the stem at the base of nodes and leaf blades.
Question 9
4 / -1

Main axis of a diatomic molecule is z, molecular orbital p_x and p_y overlap to from which of the following orbitals.

A
π molecular orbital

B
σ molecular orbital

C
δ molecular orbital

D
No bond will form

Solution

For π overlap, the lobes of the atomic orbitals are perpendicularto the line joining the nuclei.

Hence only sidewise overlapping takes place.
Question 10
4 / -1

Release of phosphates and nitrates in water bodies (rivers and lakes) leads to:

A
Increased algae growth

B
Increased growth of decomposers

C
Decreased nutrient content

D
Reduced algae growth

Solution

The release of phosphates and nitrates into water bodies will increase the nutrient content of water bodies. This process is called eutrophication.

It leads to explosive growth of blue-green alga and other aquatic vegetation.

When such aquatic organism dies, it leads to huge degradation of biomass which leads to decrease in concentration of oxygen and creates a condition of hypoxia.