laboursonline – MCQs, Mock Tests | NEET Test Series-2021 to 2022 NEET Biology MCQS Mock Test Paper 25

The Respiratory quotient (R.Q.) of C39 H72 O6 is

1. 0.72
2. 2.71
3. 1.32
4. 3.25

✅ Correct Answer: 1

In anaerobic respiration, the Respiratory quotient is

1. greater than one
2. one
3. zero
4. infinity

✅ Correct Answer: 4

What will the respiratory quotient of the mixture be when equal quantities of groundnut seeds and germinating maize is taken

1. infinity
2. greater than one
3. less than one
4. one

✅ Correct Answer: 3

The respiratory quotient of a plant structure is dependent on the substrate’s nature that is

1. metabolized
2. catabolized
3. oxidized
4. reduced

✅ Correct Answer: 3

The respiratory quotient in succulent plants is always less than one. The reason is

1. complete reduction
2. complete oxidation
3. incomplete reduction
4. incomplete oxidation

✅ Correct Answer: 4

The Respiratory quotient in germinating seeds is

1. zero
2. less than one
3. greater than one
4. one

✅ Correct Answer: 2

The energy yield due to the outcome of total oxidation of 1 molecule of glucose during the cellular respiration is enough to convert

1. 38 molecules of ADP to 38 molecules of ATP
2. 36 molecules of ADP to 36 molecules of ATP
3. 30 molecules of ADP to 30 molecules of ATP
4. 32 molecules of ADP to 32 molecules of ATP

✅ Correct Answer: 2

Carbohydrate’s respiratory quotient is

1. equal to five
2. less than unit
3. greater than unity
4. unity

✅ Correct Answer: 4

Proton concentration is highest in which part of the chloroplast?

1. Stroma
2. Intermembrane space
3. Lumen of thylakoids
4. Antennae complex

✅ Correct Answer: 3

Cyclic photophosphorylation is associated with the production of

1. ATP
2. NADPH
3. O2
4. All of the above

✅ Correct Answer: 1

During cellular respiration, chemiosmosis occurs in

1. Chloroplast
2. Mitochondria
3. Peroxisome
4. Nucleoplasm

✅ Correct Answer: 2

Which of the following is necessary for chemiosmosis?

1. Proton gradient
2. Membrane
3. Proton pump
4. All of the above

✅ Correct Answer: 4

Which of the following processes is responsible for generating a proton gradient across the thylakoid membrane?

1. Proton carrier transport H+ from stroma to lumen
2. Splitting of water on the inner side of the membrane
3. NADP reductase enzyme present at the stroma side, removes proton by reducing NADP+
4. All of the above

✅ Correct Answer: 4

Proton concentration is highest in which part of the mitochondria?

1. Matrix
2. Inner membrane
3. Outer membrane
4. Intermembrane space

✅ Correct Answer: 4

Which part of ATP synthase forms the transmembrane channel?

1. CF0
2. CF1
3. Both
4. None of the above

✅ Correct Answer: 1

The ATP synthesised by ATP synthase present in the thylakoid membrane is released towards

1. stroma
2. lumen
3. inner membrane
4. outer membrane

✅ Correct Answer: 1

ATP synthesis by ATP synthase is driven by the movement of

1. protons
2. NADPH
3. electrons
4. All of the above

✅ Correct Answer: 1

Who proposed the chemiosmotic hypothesis of ATP synthesis?

1. Francis Crick
2. H G Khorana
3. Peter Mitchell
4. J D Watson

✅ Correct Answer: 3

What stops a new chromosome variant appearing as a unique mutation from increasing in frequency?

1. It is because polyploidy is a rare process
2. it will interbreed with majority form causing heterozygotes to be inferior
3. allopatric speciation does not necessitate reinforcement
4. all of these

✅ Correct Answer: 2

This is the key to speciation of populations

1. reproductive health
2. reproductive isolation
3. population growth
4. extinction

✅ Correct Answer: 2

This can cause a steeper cline

1. Extensive migration
2. Strong selection against heterozygotes
3. Stabilizing selection throughout the region
4. All of these

✅ Correct Answer: 2

The reproductive isolating factor occurring when a sperm and an egg are incompatible is

1. temporal isolation
2. ecological isolation
3. gametic isolation
4. behavioural isolation

✅ Correct Answer: 3

Species, the biological concept is applicable only to the breeding populations

1. that are adequately large to constitute a viable reproductive group
2. that are adequately uniform to be recognized by observation
3. in experimental conditions
4. in nature

✅ Correct Answer: 4

Which of the following is included in the concept of genetic bottlenecks?

1. a loss of genetic diversity in descendent populations
2. sharing genetic material between two populations
3. extensive gene flow
4. increased ability to resist new diseases

✅ Correct Answer: 1

This type of speciation enables production of hybrids between two species

1. allopatric speciation
2. parapatric speciation
3. bottleneck
4. sympatric

✅ Correct Answer: 2

This is not a reproductive isolating mechanism

1. ecological isolation
2. individual isolation
3. temporal isolation
4. behavioural isolation

✅ Correct Answer: 2

In this kind of speciation, evolution can be expected to be faster whilst the speciation between the speciating events

1. Peripheral speciation
2. Hybridization
3. Sympatric speciation
4. Both (b) and (c)

✅ Correct Answer: 1

A new species emerges from this geographic range of its ancestor as per this theory of speciation

1. Sympatric speciation
2. Parapatric speciation
3. Allopatric speciation
4. None of these

✅ Correct Answer: 1

Lymphocytes are of two types, they are

1. T-cells and erythrocytes
2. Erythrocytes and Platelets
3. T-cells and Platelets
4. T-cells and B-cells

✅ Correct Answer: 4

Which of these immune cells are able to quickly respond post any subsequent encounter with the same antigen?

1. helper T cells
2. memory cells
3. plasma cells
4. basophil

✅ Correct Answer: 2

Basophils, eosinophils and Neutrophils are referred to as

1. Platelets
2. Astocytomas
3. Granulocytes
4. Buffers

✅ Correct Answer: 3

Cytotoxic T cells destroy the target cells

1. through injection of tumor necrosis factor
2. by phagocytosis
3. through insertion of perforins into the target’s membrane
4. by releasing oxidizing agents

✅ Correct Answer: 3

This is not a cardinal sign of inflammation

1. redness
2. heat
3. swelling and pain
4. opsonization

✅ Correct Answer: 4

_____ are released in the respiratory burst having the potent of cell-killing ability

1. histamines
2. neutrophils
3. free radicals
4. platelets-derived growth factors

✅ Correct Answer: 3

The phenomena that initiates when a helper T cell binds with a class II MHC protein on a displaying cell is referred to as

1. T cell proliferation
2. costimulation
3. self-antigen recognition
4. antigen proliferation

✅ Correct Answer: 2

The lymphocytes which can develop immunocompetence in the thymus is

1. B lymphocytes
2. T lymphocytes
3. NK cells
4. None of these

✅ Correct Answer: 2

An immune response when provoked by a nonself particle is known as

1. immunoglobulin
2. antibody
3. antigen
4. interferon

✅ Correct Answer: 3

The only blood cells which are not viewed as a part of the immune system are

1. fat cells
2. glial cells
3. osteocytes
4. red blood cells

✅ Correct Answer: 4

This phenomena can be induced in those responsible for the horizontal elements of this phylogeny

1. mitosis
2. point mutations
3. S phase of the cell cycle
4. endosymbiosis

✅ Correct Answer: 4

If cladistics were used to build a phylogenetic tree of cats, this would be the most appropriate outgroup

1. tiger
2. leopard
3. wolf
4. domestic cat

✅ Correct Answer: 3

To construct a phylogenetic tree in order to apply parsimony, choose

1. tree with fewest branch points
2. tree representing fewest evolutionary changes either in morphology or DNA sequences
3. tree in which branch points are based on as many shared characters possible
4. tree assuming all evolutionary changes with equal probability

✅ Correct Answer: 2

This is used to know the phylogeny

1. mRNA
2. rRNA
3. DNA
4. none of these

✅ Correct Answer: 2

On the basis of cladistics, this eukaryotic kingdom is polyphyletic and hence unacceptable

1. Monera
2. Protista
3. Animalia
4. Fungi

✅ Correct Answer: 2

Possessing four appendages when comparing mammals with birds is

1. a character used to sort bird species
2. example of analogy rather than homology
3. a shared derived character
4. a shared ancestral character

✅ Correct Answer: 4

Pick the incorrect statement concerning the terminologies of phylogenetics

1. branches are the lines in the tree
2. tips of the branches have long lost sequences or species
3. node indicate inferred ancestor of extant taxa
4. connecting point joining two adjacent branches is a node

✅ Correct Answer: 2

This is not a vestigial organ in man

1. coccyx
2. nails
3. third molar
4. homologous

✅ Correct Answer: 2

This is incorrect about the merits of molecular data for Phylogenetics study

1. sampling bias is involved
2. with the help of molecular data more robust and clear-cut phylogenetic tree can be constructed
3. much easier to obtain in comparison to fossil records
4. more in number compared to fossil records

✅ Correct Answer: 1

This enzyme catalyzes the transfer of a phosphoryl group from ATP to glucose

1. Hexokinase
2. Phosphoglucose isomerase
3. Aldolase
4. Phosphoglucose mutase

✅ Correct Answer: 1

Glycolysis is the conversion of

1. Fructose into phosphoenolpyruvate
2. Fructose into pyruvate
3. Glucose into phosphoenolpyruvate
4. Glucose into pyruvate

✅ Correct Answer: 4

The EMP pathway in eukaryotes usually takes place in

1. nucleus
2. lysosome
3. Golgi apparatus
4. cytosol

✅ Correct Answer: 4