R4RIN – MCQs, Mock Tests | NEET Test Series-2021 to 2022 NEET Biology MCQS Mock Test Paper 12

In corolla length of Nicotiana longiflora, polygenic inheritance was studied by

1. Nilsson-Ehle
2. Joseph Kolreuter
3. E.M. East
4. Francis Galton

✅ Correct Answer: 3

Marriages between close relatives should be avoided as it causes more

1. Abnormalities in child birth
2. Mutations
3. Recessive alleles to come together
4. Multiple births

✅ Correct Answer: 3

When two or more nonallelic gene pairs affect the same character in the same way, it is called

1. pleiotropy
2. polygenic inheritance
3. additive expressivity
4. total penetrance

✅ Correct Answer: 2

Polygenes exhibit

1. Different phenotypes
2. Different genotypes
3. Similar genotypes and phenotypes
4. Both (a) and (b)

✅ Correct Answer: 1

Traits which exhibit continuous phenotypic variation are typically determined by this inheritance form

1. incomplete dominance
2. polygene inheritance
3. multiple-allele inheritance
4. sex-linked inheritance

✅ Correct Answer: 2

One of the X chromosomes in females is inactivated by

1. environmental factors
2. enzymes coded for by mitochondrial DNA
3. number of dominant genes found on each X chromosome
4. epigenetic markers

✅ Correct Answer: 4

Pick the correct statement

1. Pleiotropic genes exhibit single phenotype
2. Pleiotropy is caused by a gene that has multiple phenotypic effect
3. Lethal genes causes the appearance of ancestral characters
4. Sickle cell anemia is an example of multifactorial inheritance

✅ Correct Answer: 2

Which of these illustrates pleiotropy?

1. Matings between earless sheep and long eared sheep always result in short eared offspring
2. Human cystic fibrosis causes many symptoms from respiratory distress to digestive problems
3. Wheat kerneis can range from white to red in color, a trait governed by multiple genes
4. The genes for scarlet eyes and hairy body in fruit flies are located on the same chromosome

✅ Correct Answer: 2

Morphan’s syndrome is as a result of

1. Polygene
2. Pseudogene
3. Modifier gene
4. Pleiotropic gene

✅ Correct Answer: 4

Find the incorrect match

1. Nostoc – water blooms
2. Basidiomycetes – puffballs
3. Spirogyra – motile gametes
4. Sargassum – Chlorophyll

✅ Correct Answer: 3

Which of the following does not have a sexual mode of reproduction?

1. Volvox
2. Spirogyra
3. Nostoc
4. Ulothrix

✅ Correct Answer: 3

Spirogyra belongs to which of the following classes?

1. Chlorophyceae
2. Phaeophyceae
3. Cyanophyceae
4. Rhodophyceae

✅ Correct Answer: 1

Which of the following is false about Spirogyra?

1. nucleolus is complex
2. heterothallism
3. each chloroplast contains a single pyrenoid
4. chromosomes are polycentric

✅ Correct Answer: 3

The ladder-like structure formed in Spirogyra is the result of

1. Asexual reproduction
2. Direct conjugation
3. Lateral conjugation
4. Scalariform conjugation

✅ Correct Answer: 4

Ribbon-shaped chloroplast is the characteristic feature of

1. Spirogyra
2. Chlamydomonas
3. Riccia
4. Ulothrix

✅ Correct Answer: 1

The type of sexual reproduction in Spirogyra is

1. isogamous
2. anisogamous
3. oogamous
4. cleistogamous

✅ Correct Answer: 1

In Spirogyra, pyrenoids are present in

1. cell wall
2. cytoplasm
3. nucleus
4. chloroplast

✅ Correct Answer: 4

Spirogyra reproduce sexually by

1. fragmentation
2. conjugation
3. somatogamy
4. akinetes formation

✅ Correct Answer: 2

Which of the following is also known as pond silk

1. Ulothrix
2. Spirogyra
3. Nostoc
4. Anabaena

✅ Correct Answer: 2

Filaments of fungi, which have thread-like appearance are called

1. Hyphae
2. Sporangium
3. Conidia
4. Mycorrhiza

✅ Correct Answer: 1

Penicillium belongs to

1. Deuteromycetes
2. Phycomycetes
3. Ascomycetes
4. Basidiomycetes

✅ Correct Answer: 3

Formation of dikaryon is characteristic of

1. Phycomycetes
2. Basidiomycetes
3. Ascomycetes
4. Both (b) and (c)

✅ Correct Answer: 4

Penicillium camemberti and Penicillium roqueforti are known for

1. causing disease to animals
2. causing disease to plants
3. imparting flavour to cheese
4. none of the above

✅ Correct Answer: 3

Penicillium is used in the production of

1. antibiotics
2. cheese fermentation
3. both (a) and (b)
4. none of the above

✅ Correct Answer: 3

No. of ascospores formed in each ascus of Penicillium is

1. 4
2. 8
3. 12
4. 16

✅ Correct Answer: 2

The fruiting body (ascocarp) of Penicillium is

1. Apothecium
2. Cleistothecium
3. Perithecium
4. Acrostroma

✅ Correct Answer: 2

Which of the following is true about conidiophores of Penicillium?

1. binucleate and colourless
2. binucleate and pigmented
3. multicellular and branched
4. Uninucleate and colourless

✅ Correct Answer: 3

Which one of the following is known as blue mould?

1. Penicillium
2. Rhizopus
3. Mucor
4. Aspergillus

✅ Correct Answer: 1

Asexual spores produced terminally on hyphae are called

1. Meiospores
2. Anthospores
3. Sporangiophores
4. Conidia

✅ Correct Answer: 4

Find the correct match

1. Molluscs – acoelomate
2. Platyhelminthes – coelomate
3. Aschelminthes – pseudocoelomate
4. Insects – pseudocoelomate

✅ Correct Answer: 3

The fluid that comes out of earthworm while piercing it (without damaging its gut) is

1. slimy mucous
2. excretory fluid
3. hemolymph
4. coelomic fluid

✅ Correct Answer: 4

Which of the following is not true about Annelida?

1. Ventral nerve cord
2. Closed circulatory system
3. Segmentation
4. Pseudocoelom

✅ Correct Answer: 4

How platyhelminthes differ from annelids?

1. bilateral symmetry
2. pseudocoel
3. body cavity is absent
4. none of the above

✅ Correct Answer: 2

Where does true coelom present in the body?

1. between mesoderm and endoderm (body wall)
2. between body wall and ectoderm
3. mesoderm and ectoderm
4. ectoderm and endoderm

✅ Correct Answer: 1

The body cavity found in echinoderms and chordates is

1. haemocoel
2. enterocoelom
3. pseudocoelom
4. schizocoelom

✅ Correct Answer: 2

Which of the following develops into pseudocoelom?

1. Archenteron
2. Blastocoel
3. Embryonic mesoderm
4. Blastopore lip

✅ Correct Answer: 2

Which of the following has haemocoel?

1. Earthworm
2. Hydra
3. Cockroach
4. Nereis

✅ Correct Answer: 3

Common characteristics of coelenterates and sponges are

1. triploblastic and pseudocoelomate
2. triploblastic and acoelomate
3. diploblastic and acoelomate
4. monoblastic and acoelomate

✅ Correct Answer: 3

The characteristic feature of Ascaris is

1. pseudocoelom and no metamerism
2. true coelom and no metamerism
3. pseudocoelom and metamerism
4. true coelom and metamerism

✅ Correct Answer: 1

Ribosomes are produced and assembled in

1. mitochondria
2. cytoplasm
3. nucleolus
4. Golgi apparatus

✅ Correct Answer: 3

An outer membrane is not present in

1. lysosomes
2. mitochondria
3. plastid
4. nucleoli

✅ Correct Answer: 4

Nucleoproteíns are synthesised in

1. cytoplasm
2. nucleoplasm
3. nuclear envelope
4. nucleolus

✅ Correct Answer: 1

Which of the components of nucleolus disappears during late prophase and reappears during telophase?

1. Nucleolus
2. Nucleoplasm
3. Chromosomes
4. Nuclear pore

✅ Correct Answer: 1

The main function of nucleolus is

1. Protein synthesis
2. ATP production
3. DNA synthesis
4. rRNA synthesis

✅ Correct Answer: 4

Which of the following can pass through a nuclear pore?

1. Ribosomal subunits
2. Mitochondria
3. mRNA
4. both (a) and (c)

✅ Correct Answer: 4

Which of the following are synthesised in the nucleolus?

1. tRNA
2. rRNA
3. DNA
4. all of the above

✅ Correct Answer: 2

Nucleoli were discovered by

1. Felice Fontana
2. Robert Hook
3. Robert Brown
4. Leeuwenhoek

✅ Correct Answer: 1

Synthesis of ribosomes in prokaryotes occurs in

1. nucleus
2. nucleolus
3. cytosol
4. nucleoplasm

✅ Correct Answer: 3

Find the incorrect statement

1. nucleoli are synthesised around nucleolar organizing regions
2. only one nucleolus is found in the nucleus
3. transcription of rDNA occurs in the fibrillar centre
4. nucleolus contains a high concentration of iron in various plant species

✅ Correct Answer: 2

Which of the following gene helps in identifying transformed cells?

1. plasmid
2. selectable marker
3. structural gene
4. vector

✅ Correct Answer: 2