NEET Test 4

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NEET Test 4

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Question 1
4 / -1

Insectivorous plants that mostly grow on swampy soil use insects as a source of

A
carbon

B
nitrogen

C
phosphorous

D
magnesium

Solution

Insectivorous plants feed on insects as their main source of food, eg, pitcher plant. Consumption of insects is due to majorly for nitrogen. Other nutritional benefits may also be acquired.
Question 2
4 / -1

Which of the following propagates through leaf-tip?

A
Walking fern

B
Sprout-leaf plant

C
Marchantia

D
Moss

Solution

Adiantum also called walking fern propagates through leaf tips, the tips of the leaves, on coming in contact with the soil, give out adventitious roots which, in turn, produce new leaves and develop into new plants.
Question 3
4 / -1

In Arthropoda, head and thorax are often fused to form cephalothorax, but in which one of the following classes, is the body divided into head, thorax arid abdomen?

A
Insecta

B
Myriapoda

C
Crustacea

D
Arachnida and Crustacea

Solution

Body of arthropods consists of head, thorax and abdomen, head and thorax may be fused to form cephalothorax in some, class Insecta have body which is divided into head, thorax and abdomen.
Question 4
4 / -1

Which one of the following is the smallest in size?

A
Bacteria

B
Mitochondrion

C
Mammalian cell

D
Virus

Solution

The virus particles are only 400nm (0.4 micrometres) in size. The mitochondria are 10 micrometres in size. Bacteria size varies from 0.5 – 5 micrometres in length. Mammalian cells have a wide variety of sizes and are the largest among all.
Question 5
4 / -1

If birds are moved from 30°C to 10°C, their body temperature

A
changes from 30°C to 10°C

B
increases by 10°C

C
does not change at all

D
decreases by 10^oC

Solution

Birds are warm-blooded animals. So they have higher metabolic rates to keep themselves warm and high temperature is maintained. This helps warm blooded animals to keep their body temperatures relatively constant. Thus when a bird is moved from 30 degrees to 10 degrees the temperature of the body remains relatively constant.
Question 6
4 / -1

Fission yeasts are

A
Archaebacteria

B
Eubacteria

C
Prokaryotes

D
Eukaryotes

Solution

Fission yeasts are mainly Schizosaccharomyces octospores. Common method of reproduction is binary fission. Life cycle is haplontic type and ascus have 8 ascospores. Yeast belongs to class fungi which is eukaryotic.
Question 7
4 / -1

Match the different types of heart given in column A with organism given in the column B. Choose the correct combination. ,

Column A ,
P. Neurogenic heart ,
Q. Bronchial heart ,
R. Pulmonary heart ,
Column B ,
(i) Human ,
(ii) King crab ,
(iii) Shark

A
P-ii, Q-iii, R-I

B
P-iii, Q-ii, R-i

C
P-i, Q-iii, R-ii

D
None of the above

Solution

– Neurogenic Heart → King crab [Arthropod]

– Bronchial Heart → Shark [Single circulation]

– Pulmonary Heart → Human
Question 8
4 / -1

From an early amphibian embryo the cells that would give rise to skin in adults were transplanted into the developing brain region of another embryo. The transplanted cells developed into brain tissue in the recipient embryo. What do you infer from this experiment?

A
Cell fate is permanently determined during early embryonic development.

B
Developmental fate of donor cells is influenced by the surrounding cells.

C
Developmental fate of donor cells is not influenced by recipient cells.

D
Any cell which is transplanted into another embryo always develops into a brain.

Solution

Early embryonic cells have yet not committed and differentiated.

In case of vertebrates the ovum is indeterminative. The fate of blastomere is not predetermined but it is determinate at the time of gastrulation.
Question 9
4 / -1

The peptidoglycans of bacteria consist of

A
sugars, D-amino acids and L-amino acids

B
sugars and only D-amino acids

C
sugars and only L-amino acids

D
sugars and glycine

Solution

Peptidoglycan or murin is a complex structure which consists of alternate units of NAM and NAG and these units remain cross-linked with short peptide chains of amino acids. Amino acids like alanine, glutamine and lysine are found in cell wall of gram-positive bacteria but in gram-negative bacteria amino acid diaminopimelic acid is found in place of lysine.
Question 10
4 / -1

The pH of the avian blood is maintained by

A
HCO₃^-

B
H₂PO₄^-

C
CH₃COO^-

D
Cl^-

Solution

pH of Blood of bird is maintain by HCO₃^—. Birds are warm blooded. Blood of birds is slightly alkaline in nature as its pH ranges from 7.5-7.6. blood bicarbonate values are between 16 and 32 mmol/L. In addition, pumping blood has a carbon dioxide partial pressure of about 28 mmHg, which is lower than that of placental mammals.
Question 11
4 / -1

The energy stored in four capacitors, each of capacitance 'C', placed in parallel configuration and connected to a 'V' volt source is

A
CV

B
CV²/2

C
(1/8)CV²

D
2CV²

Solution

As the capacitance of all the capacitors is equal(C) so, total capacitance in parallel, C' = nC

(n = number of capacitors in parallel)

So, C' = 4C

Total energy stored = 1/2 C' V²

= 1/2 (4CV²)

= 2CV²
Question 12
4 / -1

When ∆H and T∆S both are negative, then for spontaneous process which of the following conditions is true?

A
∆H >T∆S

B
∆H and T∆S both are negative H < T∆S

C
∆H = T∆S

D
∆H = ∆U

Solution

∆G = ∆H - T∆S

For the spontaneous process ∆G<0

According to the question, ∆H and T∆S both are negative. Therefore, to make the process spontaneous ∆H must be of greater magnitude than T∆S.
Question 13
4 / -1

Which of the following metals is extracted by using electrolytic reduction?

A
Copper

B
Magnesium

C
Iron

D
Silver

Solution

Magnesium is the highly reactive element and is extracted by using electrolytic reduction. This is because magnesium being a reactive electropositive element is a very strong reducing agent due to which it cannot be extracted by using any chemical method.
Question 14
4 / -1

The number of moles of carbon dioxide which contain 21.5 g of oxygen?

A
1/2mol

B
2/3mol

C
1mol

D
1/4mol

Solution

1 mole of CO₂ contains 1 mole of O₂ i.e. 32 g of oxygen.
So, number of moles of CO₂ that contains 21.5 g of oxygen is= 21.5/32 = 2/3 mol

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NEET Test 4

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NEET Test 4

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SHARING IS CARING

Question 1

carbon

nitrogen

phosphorous

magnesium

Solution

Question 2

Walking fern

Sprout-leaf plant

Marchantia

Moss

Solution

Question 3

Insecta

Myriapoda

Crustacea

Arachnida and Crustacea

Solution

Question 4

Bacteria

Mitochondrion

Mammalian cell

Virus

Solution

Question 5

changes from 30°C to 10°C

increases by 10°C

does not change at all

decreases by 10oC

Solution

Question 6

Archaebacteria

Eubacteria

Prokaryotes

Eukaryotes

Solution

Question 7

P-ii, Q-iii, R-I

P-iii, Q-ii, R-i

P-i, Q-iii, R-ii

None of the above

Solution

Question 8

Cell fate is permanently determined during early embryonic development.

Developmental fate of donor cells is influenced by the surrounding cells.

Developmental fate of donor cells is not influenced by recipient cells.

Any cell which is transplanted into another embryo always develops into a brain.

Solution

Question 9

sugars, D-amino acids and L-amino acids

sugars and only D-amino acids

sugars and only L-amino acids

sugars and glycine

Solution

Question 10

HCO3-

H2PO4-

CH3COO-

Cl-

Solution

Question 11

CV

CV2/2

(1/8)CV2

2CV2

Solution

Question 12

∆H >T∆S

∆H and T∆S both are negative H < T∆S

∆H = T∆S

∆H = ∆U

Solution

decreases by 10^oC

HCO₃^-

H₂PO₄^-

CH₃COO^-

Cl^-

CV²/2

(1/8)CV²

2CV²