R4RIN – MCQs, Mock Tests | NEET Test Series-2021 to 2022 NEET Biology MCQS Mock Test Paper 14

Nucleic acids are a polymer of nucleotide monomeric units. Each nucleotide consists of

1. base-sugar-OH
2. sugar-phosphate
3. base-sugar-phosphate
4. (base-sugar-phosphate)x

✅ Correct Answer: 3

A DNA segment contains 100 Adenine and 100 cytosines; how many nucleotides are present in the segment?

1. 100
2. 200
3. 400
4. 50

✅ Correct Answer: 3

Nucleoside contains

1. base-sugar
2. base-phosphate
3. base-sugar-phosphate
4. sugar-phosphate

✅ Correct Answer: 1

ATP is a

1. nucleoside
2. nucleotide
3. vitamin
4. nucleic acid

✅ Correct Answer: 2

Find the correct statement about phosphodiester linkage between adjacent nucleotides in nucleic acids

1. 3’-phosphate of one nucleotide joins the 3’-hydroxyl of the next nucleotide
2. 3’-phosphate of one nucleotide joins the 5’-hydroxyl of the next nucleotide
3. 5’-phosphate of one nucleotide joins the 5’-hydroxyl of the next nucleotide
4. 5’-phosphate of one nucleotide joins the 3’-hydroxyl of the next nucleotide

✅ Correct Answer: 4

The sugar molecule present in nucleotide is

1. triose
2. tetrose
3. pentose
4. hexose

✅ Correct Answer: 3

Which of the following nucleotide contains only ribose sugar and not deoxyribose?

1. Thymine – pentose sugar-phosphate
2. Uracil – pentose sugar-phosphate
3. Thymine – pentose sugar-phosphate
4. Cytosine – pentose sugar-phosphate

✅ Correct Answer: 2

Purine base found in RNA is

1. Cytosine
2. Thymine
3. Guanine
4. Uracil

✅ Correct Answer: 3

The cell wall of most of the fungi contains ________.

1. Hemicellulose
2. Chitin
3. Peptidoglycan
4. Cellulose

✅ Correct Answer: 2

Absorptive heterotrophic mode of nutrition is present in_______.

1. Pteridophytes
2. Bryophytes
3. Fungi
4. Algae

✅ Correct Answer: 3

Zygospore formation is a characteristic feature of_______.

1. Mucour/ Rhizopus
2. Puccinia
3. Alternaria
4. Penicillium

✅ Correct Answer: 1

Asexual reproduction in Rhizopus is by the formation of_______.

1. Zygospores
2. Motile zoospores
3. Sporangiospores
4. Zoogametes

✅ Correct Answer: 3

Which of the following class does Rhizopus belong to?

1. Ascomycetes
2. Chytridiomycetes
3. Deuteromycetes
4. Zygomycetes

✅ Correct Answer: 4

____ is commonly known as black bread mould.

1. Rhizobium sp
2. Rhizopus oryzae
3. Rhizopus nedosus
4. Rhizopus stolonifer

✅ Correct Answer: 4

Sexual reproduction in Rhizopus takes place by fusion of_______.

1. Two sporangia
2. Two gametangia
3. Two gametes
4. Two hyphae

✅ Correct Answer: 2

Mycelium of Rhizopus is

1. Aseptate and multinucleate
2. Septate and multinucleate
3. Aseptate and uninucleate
4. Septate and coenocyte

✅ Correct Answer: 1

Meiosis occurs in the life cycle of Rhizopus during_______.

1. Asexual reproduction
2. Formation of gametangium
3. Germination of zygospores
4. Formation of sporangium

✅ Correct Answer: 3

Asexual reproduction in Rhizopus is by the formation of_______.

1. Chlamydospores
2. Aplanospores
3. Sporangiospores
4. All of the above

✅ Correct Answer: 4

Which of the following disease is caused due to the deficiency of iodine?

1. Solitary thyroid nodules
2. Goitre
3. Thyroiditis
4. Thyroid cancer

✅ Correct Answer: 2

Which of the following is the main cause for Goitre?

1. Hypothyroidism
2. Hyperthyroidism
3. Cancer of the thyroid gland
4. All of the above

✅ Correct Answer: 4

When the progressive enlargement of a multinodular goitre causes symptomatic tracheal compression; the typically preferred treatment management in otherwise good-risk patients is ____.

1. Radioactive iodine treatment
2. Thyroid hormone treatment
3. Iodine treatment
4. Surgical resection of abnormal thyroid

✅ Correct Answer: 4

Which of the following is the most precise diagnostic screening procedure for differentiating benign thyroid nodules from malignant ones?

1. Thyroid scintiscan
2. Thyroid ultrasonography
3. Thyroid hormone suppression
4. Fine-needle-aspiration biopsy (FNAB)

✅ Correct Answer: 4

Which of the following is the most common cause of goitrous hypothyroidism in adults?

1. Hashimoto’s disease
2. Grave’s disease
3. Riedel’s thyroiditis
4. De Quervain’s thyroiditis

✅ Correct Answer: 1

A person with the enlarged thyroid gland protruded eyeball; increased BMR and weight loss is suffering from _______.

1. Grave’s disease
2. Exophthalmic goitre
3. Both (a) and (b)
4. Addison disease

✅ Correct Answer: 3

Which of the following statement is incorrect about thyroid hormones?

1. Regulates BMR
2. Maintains water and electrolyte balance
3. Supports erythropoiesis
4. Controls blood phosphate level

✅ Correct Answer: 4

Which of the following statement is true about thyroid swelling?

1. Always elevates on swelling
2. An ultrasound of the swelling is the best test to determine whether the nodule is actively secreting hormone
3. Lymph node enlargement is a good prognostic sign
4. A functional nodule on isotope scanning is unlikely to be due to cancer

✅ Correct Answer: 4

Which of the following statement is true about Grave’s disease of the thyroid?

1. It is the cause for ophthalmoplegia
2. It is the cause for large multi-nodular goitre
3. In the past; grave’s disease sometimes caused ‘Derbyshire Neck’
4. It is most common in males than in females

✅ Correct Answer: 1

Which of the following statement is true about complications of a large goitre?

1. Dysphagia is an indication for surgery
2. Causes stridor due to compression of the oesophagus
3. Causes hoarseness due to compression of the trachea
4. Causes more florid thyrotoxicosis than a smaller goitre

✅ Correct Answer: 1

Mostly; the flesh of the fruit is made of ________.

1. Collenchyma
2. Meristem
3. Collenchyma
4. Parenchyma

✅ Correct Answer: 2

In plants; the most common ground tissue is___________.

1. Cortex
2. Epidermis
3. Collenchyma
4. Parenchyma

✅ Correct Answer: 4

From mature parenchyma; plant regeneration can occur as__________.

1. there are no cell walls
2. they are nucleate
3. they can dedifferentiate
4. it forms the bulk of the ground tissue

✅ Correct Answer: 3

The plant tissues that are known for photosynthesis; secretion and storage are______.

1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. Vascular cambium

✅ Correct Answer: 1

Simple permanent tissue that is food storing is ___________.

1. Parenchyma
2. Collenchyma
3. Scleroid
4. None

✅ Correct Answer: 1

Which of the following statement is true about the spongy parenchyma?

1. Round or oval loosely arranged cells
2. Abaxially placed to palisade parenchyma
3. Continues to the abaxial epidermis
4. All of the above

✅ Correct Answer: 4

Which of the following statement is true about the palisade parenchyma?

1. Elongated cells
2. Adaxially placed
3. Vertically and parallelly placed
4. All of these

✅ Correct Answer: 4

The mesophyll of a dicot leaf is differentiated into _________.

1. Spongy parenchyma
2. Palisade parenchyma
3. Prosenchyma
4. Both (a) and (b)

✅ Correct Answer: 4

In TS of the dicotyledonous root; the parenchymatous cells which lie between the xylem and phloem are called ________.

1. Cortex
2. Cambium
3. Connective tissue
4. Conjunctive tissue

✅ Correct Answer: 4

Aerenchyma and chlorenchyma are types of ________.

1. Xylem
2. Phloem
3. Vascular bundle
4. Parenchyma

✅ Correct Answer: 4

The enzyme required for transcription is

1. RNAase
2. DNA polymerase
3. RNA polymerase
4. Restriction enzymes

✅ Correct Answer: 3

Transcription is the transfer of genetic information from

1. DNA to RNA
2. DNA to mRNA
3. mRNA to tRNA
4. tRNA to mRNA

✅ Correct Answer: 2

Sigma factor is a component of

1. DNA ligase
2. DNA polymerase
3. Endonuclease
4. RNA polymerase

✅ Correct Answer: 4

The main function of tRNA with regards to protein synthesis is

1. Proofreading
2. identifies amino acids and transports them to ribosomes
3. Inhibits protein synthesis
4. all of the above

✅ Correct Answer: 2

One end of tRNA matches genetic code in three-nucleotide sequences known as

1. codon
2. genetic code
3. blunt ends
4. anticodon

✅ Correct Answer: 4

The longest primary transcript is generated by

1. dystrophin gene
2. Tintin gene
3. neuromedin u
4. centromere protein A

✅ Correct Answer: 1

A DNA sequence is read by an RNA polymerase that produces complementary antiparallel RNA strand known as

1. Hexa transcript
2. secondary transcript
3. primary transcript
4. tertiary transcript

✅ Correct Answer: 3

Which of these subunits of RNA polymerase is totally required to initiate transcription?

1. alpha (α)
2. sigma (σ)
3. omega (ω)
4. beta (β)

✅ Correct Answer: 2

In both prokaryotic and eukaryotic cells; the synthesis of protein chains is initiated with

1. Arginine
2. Methionine
3. Serina
4. Valine

✅ Correct Answer: 2

In eukaryotes; in order to initiate transcription

1. RNA strand must be present
2. RNA polymerase must be present
3. Core promoter sequence must be present
4. None of these

✅ Correct Answer: 3

The least level of chromosome organization is

1. 30nm fibre
2. solenoid
3. nucleosome
4. none of the above

✅ Correct Answer: 3

This has the largest number of chromosomes

1. Pisum sativum
2. Giant redwood tree
3. Haplopappus gracilis
4. Ophioglossum reticulatum

✅ Correct Answer: 4