laboursonline – MCQs, Mock Tests | NEET Test Series-2021 to 2022 NEET Biology MCQS Mock Test Paper 22

The spicules of silica are found in

1. Grantia
2. Leucosolenia
3. Sycon
4. Hyalonema

✅ Correct Answer: 3

This about sponges is true

1. large stomach
2. chitinous spicules
3. one mouth, many exits in the body
4. many mouth openings and one exit chitinous spicule

✅ Correct Answer: 4

These sponges are found in rivers

1. Sycon
2. Spongilla
3. Cliona
4. Hyalonema

✅ Correct Answer: 2

In sponges, this chamber is common to all the types of canal systems

1. radial chamber
2. incurrent canal
3. excurrent canal
4. paragastric cavity

✅ Correct Answer: 4

Amphiblastula is the larva of _________

1. Planaria
2. Sycon
3. Leucosolenia
4. Hydra

✅ Correct Answer: 2

The primitive multicellular entities, sponges have

1. Tissue grade of organization possessing organs and organ systems
2. Cellular grade of organizations with absence of organs and organ systems
3. Both of these
4. None of these

✅ Correct Answer: 2

This is the excretory waste of Sycon

1. urea
2. uric acid
3. ammonia
4. none of these

✅ Correct Answer: 3

In Sycon, the epithelial lining is made of

1. Choanocytes
2. Amoebocytes
3. Both (a) and (b)
4. Pinacocytes/flat cells

✅ Correct Answer: 4

This best describes a polysome

1. active site for synthesis of lipids
2. active site for synthesis of proteins
3. active site for synthesis of DNA
4. all of these

✅ Correct Answer: 2

In protein synthesis, translocation is initiated with the movement of

1. tRNA from P-site to the A-site
2. dipeptidyl tRNA from A-site to P-site
3. tRNA from A-site to P-site
4. tRNA from P-site to E-site

✅ Correct Answer: 2

The process by which protein synthesis from genetic code occurs is best described by

1. transcription
2. translation
3. replication
4. reproduction

✅ Correct Answer: 2

This is incorrect about the nature of genetic code. Codons are

1. universal
2. overlapping
3. commaless
4. triplet

✅ Correct Answer: 2

This elongation factor is known as translocase

1. EFG
2. EF2
3. both (a) and (b)
4. EF-Tu and EF-Ts

✅ Correct Answer: 3

This drug inhibits the initiation step of translation

1. ricin
2. tetracycline
3. streptomycin
4. cyclohexylamine

✅ Correct Answer: 3

In translation, this is not an essential component

1. amino acid
2. ligase
3. mRNA
4. anticodon

✅ Correct Answer: 2

This identifies a particular amino acid and its cognate tRNA molecule

1. topoisomerase
2. rRNA
3. Ribosome
4. tRNA synthetase

✅ Correct Answer: 4

Protein synthesis corresponds to the process of

1. duplicating required DNA for synthesis of proteins
2. formation of amino acids from mRNA
3. formation of mRNA from DNA template
4. formation of amino acids from DNA template directly

✅ Correct Answer: 2

This is considered to be the start codon

1. AGG
2. UAG
3. GUG
4. AUG

✅ Correct Answer: 4

This can be used to demarcate a facultative parasite

1. can become a parasite but is actually a saprophyte
2. can become a saprophyte but is actually a parasite
3. only requires dead organic matter to sustain
4. requires a living host inevitably

✅ Correct Answer: 3

Pick the incorrect statement about Fungi

1. Can be anaerobic
2. Can be photosynthetic
3. Can be multicellular
4. Can be saprophytic

✅ Correct Answer: 2

The reason why there is a close association between fungi and algae in lichen is because the fungus

1. releases oxygen for algae
2. fixes atmospheric nitrogen for algae
3. provides food for algae
4. provides anchorage, protection and absorption for algae

✅ Correct Answer: 4

Facultative saprophyte is

1. always a saprophyte
2. always a parasite
3. a parasite which may live as a saprophyte
4. may adapt a parasitic lifestyle

✅ Correct Answer: 3

Lichens are a known combination of fungi and algae where the fungus is

1. a symbiotic relationship with algae
2. a parasitic relationship with algae
3. an epiphytic relationship with algae
4. a saprophytic relationship with algae

✅ Correct Answer: 1

Fungi are ____________ when they feed on dead organic matter

1. Saprophytes
2. Parasites
3. Dimorphic
4. None of the above

✅ Correct Answer: 1

Parasitic and saprobiotic mode of nutrition are found in

1. Fungi
2. Bacteria
3. Both (a) and (b)
4. Viruses

✅ Correct Answer: 3

This one is saprophytic in nutrition

1. virus
2. cyanobacteria
3. fungi
4. all of these

✅ Correct Answer: 3

When one organism obtains nutrition from the other, the mode of nutrition is

1. heterotrophic
2. symbiosis
3. autotrophic
4. none of these

✅ Correct Answer: 1

This has a saprophytic mode of nutrition

1. Mushroom
2. Leech
3. lice
4. roundworm

✅ Correct Answer: 1

Micro propagation involves

1. small explants used for vegetative multiplication of plants
2. microbes used for vegetative multiplication of plants
3. microspores used for vegetative multiplication of plants
4. megaspores and microspores used for non-vegetative multiplication of plants

✅ Correct Answer: 1

Pick the incorrect statement – Agar is a gelling agent in plant tissue culture medium

1. it is not digested by the enzymes of plants
2. it is not used in micropropagation work
3. does not react with media constituents
4. remains stable at incubation temperature

✅ Correct Answer: 2

Solidifying agent that is used in plant tissue culture is

1. Agar
2. EDTA
3. Cobaltous chloride
4. Nicotinic acid

✅ Correct Answer: 1

Benefit of clonal propagation or micropropagation is

1. multiplication of sexually derived sterile hybrids
2. multiplication of disease free plants
3. rapid multiplication of superior clones
4. all of these

✅ Correct Answer: 4

Protoplasts can be synthesized from suspension cultures, intact tissues or callus tissues by the enzymatic treatment with

1. proteolytic enzymes
2. both pectolytic and cellulolytic enzymes
3. pectolytic enzymes
4. cellulolytic enzymes

✅ Correct Answer: 2

In artificial media, the growth of plant tissues is

1. gene expression
2. transgenesis
3. plant tissue culture
4. cell hybridization

✅ Correct Answer: 3

An excised piece of stem tissue or leaf used in micropropagation is

1. scion
2. explant
3. medium
4. microshoot

✅ Correct Answer: 2

Protoplasts are devoid of

1. cell wall
2. cell membrane
3. both cell membrane and cell wall
4. none of these

✅ Correct Answer: 1

This plant propagation technique uses girdling

1. cuttings
2. grafting
3. both (a) and (b)
4. layering

✅ Correct Answer: 4

______ is used to develop virus free plants

1. cell suspension culture
2. protoplast culture
3. meristem culture
4. organ culture

✅ Correct Answer: 3

Protein-energy malnutrition (PEM) corresponds to a state where the infant’s dietary intake is deficient in

1. Carbohydrates
2. overall calories
3. proteins
4. both (b) and (c)

✅ Correct Answer: 4

The availability of proteins and energy and inadequate absorption in the body is known as

1. pepsin energy malnutrition
2. pepsin enzyme malnutrition
3. protein energy malnutrition
4. protein excess malnutrition

✅ Correct Answer: 3

PEM is mostly seen and has the most destructing consequences in

1. adulthood and adolescence
2. adolescence and early childhood
3. infancy and early childhood
4. only infancy

✅ Correct Answer: 3

Up to the age of six months, this is the ideal food for newborns and young infants

1. soy milk
2. rice cereal
3. breast milk
4. iron-fortified formula

✅ Correct Answer: 3

Disorders related to nutritions is known as

1. balancing of nutrition
2. insolubility of nutrition
3. solubility of nutrition
4. malnutrition

✅ Correct Answer: 4

Which of the following diseases is caused by protein-energy malnutrition?

1. angina
2. goiter
3. marasmus
4. tuberculosis

✅ Correct Answer: 3

A newborn infant, as part of routine is immediately assessed with this procedure after delivery

1. infant functionality scale
2. Apgar scoring system
3. neonatal development scale
4. Dubowitz-Ballard scale

✅ Correct Answer: 2

Phenylketonuria is a genetic disorder impairing the metabolism of

1. amino acid phenylalanine
2. Polyunsaturated fatty acids
3. proteins
4. none of these

✅ Correct Answer: 1

This can be the first indication that PEM has led to the permanent damage to the brain

1. low birth weight
2. premature birth
3. a reduced circumference of the head
4. slowed reflexes during birth

✅ Correct Answer: 3

The type of nutrition in which more nutrients are consumed than the required quantity for normal growth of the body

1. pepsin-enzyme malnutrition
2. mineral deficiency diseases
3. over intake of nutrients
4. protein energy malnutrition

✅ Correct Answer: 3

In 1955, the person who invented the Polio vaccine was

1. Hiram Maxim
2. Theodore Roosevelt
3. Jonas Salk
4. Joseph Stalin

✅ Correct Answer: 3

Pick the correct statement regarding vaccines of Polio

1. Salk is an inactivated polio vaccine
2. Sabin is live attenuated polio vaccine
3. Salk and Sabin are polio vaccines
4. All the above are correct

✅ Correct Answer: 3