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NEET Part Test - 5 - NEET MCQ


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30 Questions MCQ Test NEET Mock Test Series 2025 - NEET Part Test - 5

NEET Part Test - 5 for NEET 2024 is part of NEET Mock Test Series 2025 preparation. The NEET Part Test - 5 questions and answers have been prepared according to the NEET exam syllabus.The NEET Part Test - 5 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for NEET Part Test - 5 below.
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NEET Part Test - 5 - Question 1

A uniform, horizontal parallel beam of light is incident upon a prism as shown. The prism is in the shape of a quarter cylinder, of radius R = 5 cm, and has the index of refraction n = 5/3. The width of the region at which the incident rays after normal incidence on plane surface and subsequent refraction at curved surface intersect on x  axis is (Neglect the ray which travels along x-axis as shown in figure)

Detailed Solution for NEET Part Test - 5 - Question 1

The ray just above x-axis shall after refraction at curved surface intersect x axis at (A) a distance x1 from O.


The critical angle for air-glass interface is  . the rays above the ray incident on curved surface at i = 370 shall suffer TIR and need not be considered.

The ray incident as curved surface at θ= 370 after refraction intersect curved surface at (B) a distance x2 from O.

In Δ PBC

NEET Part Test - 5 - Question 2

The chief pigment associated in process of photosynthesis is:

Detailed Solution for NEET Part Test - 5 - Question 2

Chlorophyll a, shows higher rate of photosynthesis. Hence, it is conclude that chlorophyll a is the chief pigment associated with photosynthesis.

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NEET Part Test - 5 - Question 3

Thylakoids possessing four types of major complexes have their membranes made up of both proteins and unsaturated lipids. Which of the following complexes is/are evenly distributed in the stroma and granal thylakoids?

a. Photosystem I
b. Photosystem II
c. Cyt b6-f complex

Detailed Solution for NEET Part Test - 5 - Question 3

This option is correct. Cyt b6-f complexes are evenly distributed in the stroma and granal thylakoids.

NEET Part Test - 5 - Question 4

In photosynthesis, photolysis of water is used in:

Detailed Solution for NEET Part Test - 5 - Question 4

Photolysis of water is mainly carried out to compensate the electrons that are transferred to photosystem I by photosystem II during the non-cyclic photophosphorylation that reduce NADP+ into NADPH.

NEET Part Test - 5 - Question 5

How many ATPs are required by C4 plants in synthesis of one molecule of glucose

Detailed Solution for NEET Part Test - 5 - Question 5

Most of the plants that are adapted to dry tropical regions have the Cpathway. e.g. Sugarcane, Maize, Sorghum,etc. These plants are known as Cplants. For the formation of sugars, Cplants undergo C4 cycle as well as C3 cycle or Calvin cycle. In these plants double fixation of carbon dioxide occurs.

ATP consumed in C4 plants:

C4 cycle - 2 ATP per COfixed

C3 cycle - 3 ATP per CO2 fixed 

Total - 5 ATP per CO2 fixed

Thus, to form one molecule of glucose or to fix 6 CO2, 6 X 5 = 30 ATP are consumed.

NEET Part Test - 5 - Question 6

Most abundant enzyme in the world:

Detailed Solution for NEET Part Test - 5 - Question 6

RuBisCO that is the most abundant enzyme in the world and is characterised by the fact that its active site can bind to both CO2 and O2 hence the name.

NEET Part Test - 5 - Question 7

Which one of the following is a matching set of a phylum and its three examples?

Detailed Solution for NEET Part Test - 5 - Question 7

Phylurm Mollusca includes those animals which have a soft body, usually furnished with a shell. The body is divided into a head, muscular foot and visceral mass. Loligo (squid), Teredo (shipworm) and Octopus are some of its examples.

NEET Part Test - 5 - Question 8

Bilateral symmetry, metameric segmentation, coelom and open circulatory system chiaracterizes which of the following phylum?

Detailed Solution for NEET Part Test - 5 - Question 8

Arthropods show various body shapes with bilateral symmetry. They show incomplete metameric segmentation. They have true coelom containing haemocoel. In arthropods, blood vascular/circulatory system is of open type where blood flows in haemocoel instead of blood vessels.

NEET Part Test - 5 - Question 9

Which one of the following statements about certain given animals is correct?

Detailed Solution for NEET Part Test - 5 - Question 9

A body cavity can mean any Interna space, or a series of spaces present inside body, whereas coelom or true body cavity generally refers to a large fluid-filled space (cavity) lying between the outer body wall and the inner digestive tube. In acoelomates no body cavity or coelom is present. Embryonic mesoderm remains as a solid layer, space between endoderm (gut wall) and ectoderm (body wall) is filled with mesenchyme and muscle fibres. In pseudocoelomates body space is a pseudocoelom or false coelom. In coelomates or eucoelomates body space is a true coelom enclosed by mesoderm on both sides. Aschelminthes are pseudocioelomates Molluscs and insects are coelomates while flatworms are acoelomates.

NEET Part Test - 5 - Question 10

Which is not correct for sponges?

Detailed Solution for NEET Part Test - 5 - Question 10

In sponges, sexes are not separate (hermaphrodite) i.e., eggs and sperms are produced by the same individuals. Sperms leave one sponge and enter another with water current to fertilize the ova (eggs) in situ. Thus, fertilization is internal.

NEET Part Test - 5 - Question 11

In which of the following, segmentation in the body is first observed?

Detailed Solution for NEET Part Test - 5 - Question 11

Segmentation is division or differentiation of the body into distinct portions called segments. It is first observed phylum Annelida.

NEET Part Test - 5 - Question 12

Among the following organisms which is a completely non-parasitic form?

Detailed Solution for NEET Part Test - 5 - Question 12

Sea anemone is not parasitic. It shows mutualism with hermit crab. Tapeworm is an endoparasite while leech and mosquito are exoparasites.

NEET Part Test - 5 - Question 13

Consider the following statements (A - C) each with two blanks.
A. Animals like Hydra and Jelly fish depict (i) symmetry whereas all vertebrates show (ii) symmetry.
B. In fiii) and (iv) digestive tract has only sngle opening (mouth) and is said to be incomplete.
C. Trichinella (Trichina worm) is a cosmopolitan (v) parasite whereas Fasciola (liver fluke) lives in the ducts of the liver of (vi)
Which one of the following options, gives the correct fill ups for the respective blank numbers from (i) to (vi) in the statements?

Detailed Solution for NEET Part Test - 5 - Question 13

In animals like Hydra, jelly fish, star fish, the body can be divided into equal halves by any plane passing through the centre from top to bottom, thus exhibiting radial symmetry. In many vertebrates body can be divided into two equal halves by a single plane only thus exhibiting bilateral symmetry.
In the blind sac body plan the body has a single cavity with one opening to the outside. The single opening functions as both mouth for ingestion and anus for egestion. It is found in coelenterates and flatworms (Platyhelminthes).

NEET Part Test - 5 - Question 14

Read the given statements and select the correct option.
Statement 1: All triploblastic animals are eucoelomates.
Statement 2: They have a false coelom.

Detailed Solution for NEET Part Test - 5 - Question 14
  • Animals that belong to the phylum Platyhelminthes to Chordata are all triploblastic.
  • But Platyhelminthes and aschelminthes belong to pseudocoelomates.
  • Annelids, arthropods, echinoderms and chordates are under eucoelomates. This means not all triploblastic animals are eucoelomates. 
  • Pseudocoelomates have false coelom while eucoelomate animals only have the true coelom. 

Hence, both statement 1 and statement 2 are incorrect. 

NEET Part Test - 5 - Question 15

Examine the figures of diploblastic (i) and triploblastic (ii) organization in animals given below and identify the labelled parts A to D.

Detailed Solution for NEET Part Test - 5 - Question 15

A - Ectoderm
B - Endoderm
C - Mesoglea
D - Mesoderm
So, the correct answer is 'A - Ectoderm, B - Endoderm, C - Mesoglea, D - Mesoderm'.

NEET Part Test - 5 - Question 16

The synthesis of complex organic substances from simple inorganic raw materials in the presence of sunlight and chlorophyll is called ..........., which is a ............ process.

Detailed Solution for NEET Part Test - 5 - Question 16

Photosynthesis is an enzyme regulated anabolic process which involves the synthesis of organic compounds, inside the chlorophyll containing cells, from CO2 and H2O with the help of sunlight as a source of energy. Oxygen evolved during photosynthesis comes from water. The equation for photosynthesis can be summarised as follows.

NEET Part Test - 5 - Question 17

Visible part of electromagnetic spectrum consists of radiations having a wavelength in the range of

Detailed Solution for NEET Part Test - 5 - Question 17

Light is the visible part of electomagnetic radiations. Visible light consists of radiations having a wavelength between 390-760 nm (or 399-430nm), blue of indigo (430-470nm), blue green or blue (470-500nm), green (500-580nm), yellow (580-600nm), orange (600-650nm), orange red (650-600nm) and red (660-760nm).

NEET Part Test - 5 - Question 18

Which of the below statements is/are not correct regarding chlorophyll a molecule?

(i) Molecule formula of chl a is C55​H72​O5​N4​Mg
(ii) It is the primary photosynthetic pigment.
(iii) In the pure state, it is red in colour and thus it absorbs more blue wavelength of light than the red wavelength. 
(iv) It is a soluble in water as well as petroleum ether.

Detailed Solution for NEET Part Test - 5 - Question 18

Chlorophyll a is the primary photosynthetic pigment, which is bluish green in the pure state. It has an empirical formula C55​H72​O5​N4​ Mgand molecular weight of 893. It absorbs more red wavelength of light than violet blue . It is soluble in a number of organic solvents such as petroleum ether. 

NEET Part Test - 5 - Question 19

Accessory photosynthetic pigments in most green plants are 

Detailed Solution for NEET Part Test - 5 - Question 19

Chlorophyll a is found in almost all photosynthetic plants except bacteria. It is called primary photosynthetic pigment because it performs primary reactions of photosynthesis which involve conversion of light energy into chemical energy. Other photosynthetic pigments like chlorophyll b, xanthophylls and carotenes are called accessory pigments. They absorb light energy of different wavelengths, broaden the spectrum of light absorption and hand over the energy to chlorophyll a through electron spin resonance and also protect chlorophyll a from photo-oxidation.

NEET Part Test - 5 - Question 20

Which occurs during the light reaction of photosynthesis

Detailed Solution for NEET Part Test - 5 - Question 20

The chlorophyll pigments which are excited give up their electrons and to compensate for the loss of electrons, water is split to release four H+ ions and four electrons and O2. The electrons that are lost from the PSII enter into an electron transfer chain or ETC.

NEET Part Test - 5 - Question 21

Study carefully the given flow chart and fill in the blanks (A), (B), (C), (D) and (E).

Detailed Solution for NEET Part Test - 5 - Question 21

(A) Cellular level
(B) Radial symmetry
(C) Bilateral symmetry
(D) Pseudocoelomates
(E) Coelomates

NEET Part Test - 5 - Question 22

Gibberellic acid is a/an:

Detailed Solution for NEET Part Test - 5 - Question 22
  • Gibberellic acid is a Terpene.
  • All known gibberellins are diterpenoid acids that are synthesized by the terpenoid pathway in plastids and then modified in the endoplasmic reticulum and cytosol until they reach their biologically-active form.
  • All gibberellins are derived via the ent-gibberellane skeleton, but are synthesized via ent-kaurene.
NEET Part Test - 5 - Question 23

Antibodies in our body are complex:

Detailed Solution for NEET Part Test - 5 - Question 23

Antibodies in our body are present in the blood in form of glycoproteins. They produce antigens in response to foreign particles to provide immunity against the pathogen.

NEET Part Test - 5 - Question 24

Where memory cells are formed?

Detailed Solution for NEET Part Test - 5 - Question 24

Memory cells are formed in lymphocytes of WBC. Immunization against the particular disease based on the function of memory cell induced due to mild, heat killed pathogen administrated during immunization.

NEET Part Test - 5 - Question 25

Assertion: Many visitors to the hills suffer from skin and respiratory allergy problems.

Reason: Conifer trees produce a large quantity of wind-borne pollen grains.

Detailed Solution for NEET Part Test - 5 - Question 25

Skin and respiratory allergy problems arise in hilly areas due to allergen present in these areas. Allergen induce inflammatory reaction in the body.

NEET Part Test - 5 - Question 26

AIDS is caused by Human immuno deficiency virus (HIV) which is a member of group of virus called?

Detailed Solution for NEET Part Test - 5 - Question 26

AIDS is caused by Human immunodeficiency virus of member of group of virus called retrovirus. It is a type of RNA virus that inserts a copy of its genome into the DNA of a host cell that it invades, thus changing the genome of that cell.

NEET Part Test - 5 - Question 27

The enzyme that interconnects the glycolysis and kreb cycle is:

Detailed Solution for NEET Part Test - 5 - Question 27

The two molecules of pyruvic acid (produced from one glucose molecule during glycolysis). The acetyl CoA then enters a cyclic pathway, tricarboxylic acid cycle, more commonly called as Krebs’ cycle. Thus, acetyl-CoA interconnecting between two cyclic pathways.

NEET Part Test - 5 - Question 28

Which of the following reactions is catalysed by the enzyme phosphofructokinase?

Detailed Solution for NEET Part Test - 5 - Question 28

Phosphofructokinase is a kinase enzyme that phosphorylates fructose-6-phosphate in glycolysis. The enzyme catalysed transfer of a phosphoryl group from ATP is an important reaction in a wide variety of biological processes.

NEET Part Test - 5 - Question 29

Which period of menstrual cycle is called  the risky period of conception?

Detailed Solution for NEET Part Test - 5 - Question 29
  • 10th to 17th day of menstrual cycle is called the risky period of conception as during which ovulation takes place.
  • If sexual intercourse occurs during this period, there is a very high chance of fertilisation that may leads to pregnancy.

Hence, the correct option is D.
NCERT Reference: topic “POPULATION EXPLOSION AND BIRTH CONTROL” of chapter Reproductive Health of NCERT.

NEET Part Test - 5 - Question 30

Identify the intra-uterine contraceptive device from the figure given below

Detailed Solution for NEET Part Test - 5 - Question 30
  • Copper T is a small, T-shaped intrauterine contraceptive device (IUCD).
  • The horizontal bar of which fits into the wide top of the uterus and the vertical bar extends down the uterus. It makes the uterus and fallopian tubes produce fluid that kills sperm. This fluid contains white blood cells, copper ions, enzymes, and prostaglandins.
  • Copper ions, released by the IUD, is a spermicide and it kills sperm before it can fertilize the egg.

Intrauterine Devices (IUDs) - Women's Health Issues - MSD Manual Consumer  Version

Hence, the correct option is A.
NCERT Reference: topic “POPULATION EXPLOSION AND BIRTH CONTROL” of chapter Reproductive Health of NCERT.

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