300+ REAL TIME NEET Biology Objective Questions & Answers 2023

300+ TOP MCQs on Porifera and Answers

NEET Biology is the vey important paper in the medical entrance exam. Here, you will discover the NEET Biology MCQs and Answers for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution . NEET Biology Porifera Multiple Choice Questions

MCQs on Porifera :

1. This about sponges is true
(a) one mouth, innumerable exits
(b) innumerable mouths, one exit
(c) large spacious stomach
(d) spicules are composed of chitin

Answer

Answer: (b)

2. _____________ is the name of the dried skeleton of ‘Venus flower basket’
(a) Euplectella
(b) Euspongia
(c) Leucosolenia
(d) Spongila

Answer

Answer: (a)

3. Members of phylum porifera are
(a) Mostly freshwater animals but few are marine entities
(b) Mostly marine animals but few are fresh water entities
(c) Exclusively freshwater animal
(d) Exclusively marine animals

Answer

Answer: (b)

4. Animals lacking excretory, respiratory and circulatory structures are
(a) Sponges
(b) Tapeworms
(c) Liver fluke
(d) Threadworms

Answer

Answer: (a)

5. These are ‘multicellular grade’ entity
(a) Vertebrates
(b) Sponges
(c) Prokaryotes
(d) Coelenterates

Answer

Answer: (b)

6. The group of animals to which Sycon belongs, can be best described as
(a) Multicellular having tissue organization, but not a body cavity
(b) Unicellular or acellular
(c) Multicellular with a gastrovascular
(d) Multicellular without any tissue organization

Answer

Answer: (d)

7. Collared, flagellated cells that cover large parts of the inner chambers of sponges, helping water circulation to continue are
(a) Porocytes
(b) Choanocytes
(c) Amoebocytes
(d) Pinacocytes

Answer

Answer: (b)

8. This is a flagellated larva of Leucosolenia
(a) Maggot
(b) Kedia
(c) Planula
(d) Parenchymula

Answer

Answer: (d)

9. Poriferan evolution from protozoans is evidenced by animals such as
(a) Paramecium
(b) Euglena
(c) Chlamydomonas
(d) Volvox

Answer

Answer: (d)

10. The chamber common to all the types of canal system of sponges is
(a) Excurrent canal
(b) Radial chamber
(c) Incurrent canal
(d) Paragastric cavity

Answer

Answer: (d)

300+ TOP MCQs on Archaebacteria and Answers

MCQs on Archaebacteria :

1. Some bacteria thrive in extreme environment conditions such as absence of oxygen, high salt concentration, high temperature and acidic pH. It is
(a) Eubacteria
(b) Cyanobacteria
(c) Archaebacteria

Answer

Answer: (c)

2. This about archaebacteria is true
(a) All halophiles
(b) all photosynthetic
(c) old living entities
(d) all fossils

Answer

Answer: (c)

3. Some hyperthermophilic organisms that grow in highly acidic (pH2) habitats belong to the two groups called
(a) Cyanobacteria and Diatoms
(b) Liverworts And Yeasts
(c) Protists And Mosses
(d) Eubacteria And Archaea

Answer

Answer: (d)

4. This is found in extreme saline conditions
(a) eubacteria
(b) cyanobacteria
(c) archaebacteria
(d) mycobacteria

Answer

Answer: (c)

5. Most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorized as
(a) heterotrophic bacteria
(b) archaebacteria
(c) cyanobacteria
(d) chemosynthetic autotrophs

Answer

Answer: (a)

6. Methanogens belong to
(a) slime moulds
(b) dinoflagellates
(c) eubacteria
(d) archaebacteria

Answer

Answer: (d)

7. Archaebacteria is different from eubacteria in having
(a) cell shape
(b) mode of reproduction
(c) mode of nutrition
(d) cell membrane structure

Answer

Answer: (d)

8. Methanococcus, Thermococcus and Methanobacterium exemplify
(a) bacteria that contain a cytoskeleton and ribosomes
(b) bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
(c) archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
(d) archaebacteria that contain protein homologous to eukaryotic core histones

Answer

Answer: (c)

9. After the new classification of living organisms into three domains of life (bacteria, archaea and eukarya) which one of the following is true about archaea?
Archaea ____________
(a) completely differ from prokaryotes
(b) completely differ from both eukaryotes and prokaryotes
(c) have some novel features that are absent in other eukaryotes and prokaryotes
(d) resemble eukarya in all respects

Answer

Answer: (c)

10. Which of the following are likely to be present in deep sea water
(a) eubacteria
(b) archaebacteria
(c) saprophytic fungi
(d) blue-green algae

Answer

Answer: (b)

300+ TOP MCQs on Fertilization and Answers

MCQs on Fertilization :

1. Sperm lysin, the enzymatic substance produced by sperms in mammals is known as
(a) cryanogamone
(b) hyaluronic acid
(c) androgamone
(d) hyaluronidase

Answer

Answer: (d)

2. Egg development without fertilization is known as
(a) Parthenogenesis
(b) Metagenesis
(c) Gametogenesis
(d) Oogenesis

Answer

Answer: (a)

3. After a sperm has penetrated an ovum in the process of fertilization, entry of further sperms is prevented by
(a) condensation of yolk
(b) development of the vitelline membrane
(c) formation of fertilization membrane
(d) development of the pigment coat

Answer

Answer: (c)

4. In the process of fertilization, this is true
(a) entry of sperm activates the egg for completing meiosis
(b) only one sperm reaches the egg and enters it
(c) only the acrosome of the sperm enters the egg
(d) two haploid nuclei fuse and immediately divide to produce two nuclei which are again haploid

Answer

Answer: (a)

5. In rabbits, humans and other placental mammals, fertilization occurs in
(a) vagina
(b) ovary
(c) fallopian tubes
(d) uterus

Answer

Answer: (c)

6. In female mammals Bartholin’s glands open into the
(a) Fallopian tubes and release a secretion which makes sperms motile
(b) uterus and release a lubricating fluid during the birth of young ones
(c) vestibule and release a lubricating fluid in the vagina
(d) urinary bladder and assist in release of urine

Answer

Answer: (c)

7. This is a minute cell which separates from the animal egg during maturation is known as
(a) Primary oogonia
(b) secondary oogonia
(c) primary spermatogonia
(d) polar bodies

Answer

Answer: (d)

8. The nutritive medium for the ejaculated sperms is given by
(a) fallopian tube
(b) uterine lining
(c) seminal fluid
(d) vaginal fluid

Answer

Answer: (c)

9. This helps in the penetration of egg by the sperm
(a) fertilization membrane
(b) antifertilizin
(c) sperm lysin
(d) fertilizin

Answer

Answer: (c)

10. In a man, sperms move after ejaculation at a rate of nearly
(a) 2 to 4 inches/minute
(b) 2 to 4 mm/minute
(c) 2 to 4 cm/minute
(d) 2 to 4 feet/minute

Answer

Answer: (b)

300+ TOP MCQs on Manures and Fertilizers and Answers

MCQs on Manures and Fertilizers :

1. Green manure plants are
(a) Poaceae
(b) Solanaceae
(c) Leguminosae
(d) Compositae

Answer

Answer: (c)

2. This chemical fertilizer is essential for better rhizobial nitrogen fixation
(a) calcium
(b) potassium
(c) sodium
(d) phosphorus

Answer

Answer: (d)

3. Azolla is used as a biofertilizer as it possesses
(a) humus in large quantities
(b) rhizobium
(c) mycorrhiza
(d) cyanobacteria

Answer

Answer: (d)

4. Pyrethrin is obtained from
(a) Chrysanthemum cinerariifolium
(b) Azadirachta indica
(c) Urtica dioica
(d) Tagetes erecta

Answer

Answer: (a)

5. This is not included in organic farming
(a) crop rotation
(b) chemical fertilizer
(c) green manures
(d) compost and farmyard manures

Answer

Answer: (b)

6. Appropriate use of cow dung is made in
(a) medicine
(b) fuel
(c) manure
(d) building/construction material

Answer

Answer: (c)

7. In children, this disease is caused due to excess nitrate fertilizers usage
(a) mumps
(b) jaundice
(c) septicemia
(d) methaemoglobinaemia

Answer

Answer: (d)

8. For paddy, the best fertilizer is
(a) Bacillus polymyxa
(b) Bacillus megaterium
(c) Azolla pinnata
(d) Rhizobium meliloti

Answer

Answer: (c)

9. Composited manure is formed from
(a) farm and household refuse
(b) animal refuse and rotted vegetable
(c) organic wastes from where biogas extraction takes place
(d) green and farmyard manure

Answer

Answer: (b)

10. A green manure is
(a) Maize
(b) Rice
(c) Sorghum
(d) Sesbania

Answer

Answer: (d)

300+ TOP MCQs on Animal Tissue and Answers

MCQs on Animal Tissue :

1. In connective tissue sheaths, this is the correct sequence stretching from the outermost to the innermost layer
(a) epineurium, endoneurium, perineurium
(b) perineurium, epineurium, endoneurium
(c) perineurium, endoneurium, epineurium
(d) epineurium, perineurium, endoneurium

Answer

Answer: (d)

2. This is the difference between a nerve and a neuron
(a) consists of different number of cells
(b) one has motor and other has sensory function
(c) nerves are made of grey matter while neurons of white matter
(d) nerves are present in central nervous system only

Answer

Answer: (a)

3. The only connective tissue without fibroblasts is
(a) areolar connective tissue
(b) bone
(c) cartilage
(d) blood

Answer

Answer: (d)

4. In these tissue cells, Lacunae are enclosed
(a) Cartilage
(b) Bone tissue
(c) both (a) and (b)
(d) muscular tissue

Answer

Answer: (c)

5. Mast cells are linked to
(a) neural tissue
(b) areolar connective tissue
(c) endocrine glands
(d) exocrine glands

Answer

Answer: (b)

6. These are brain macrophages
(a) astrocytes
(b) microglial cells
(c) ependymal cells
(d) oligodendrocytes

Answer

Answer: (b)

7. This is not a function of neuroglia
(a) phagocytosis
(b) isolation of neurons
(c) secretion of cerebrospinal fluid
(d) information processing

Answer

Answer: (d)

8. This cell is not a type of neuroglia found in CNS
(a) microglia
(b) astrocytes
(c) ependymal cells
(d) Schwann cells

Answer

Answer: (d)

9. Categorization of epithelial tissue is based on this
(a) function
(b) type of matrix
(c) structural modification
(d) non voluntary or voluntary action

Answer

Answer: (c)

10. This is correct about epithelial tissue
(a) lack of nerve supply
(b) lack of blood supply
(c) lack of free surface
(d) lack of intercellular matrix

Answer

Answer: (b)

300+ TOP MCQs on Polygenic Inheritance and Answers

MCQs on Polygenic Inheritance :

1. In corolla length of Nicotiana longiflora, polygenic inheritance was studied by
(a) Joseph Kolreuter
(b) E.M. East
(c) Francis Galton
(d) Nilsson-Ehle

Answer

Answer: (b)

2. Marriages between close relatives should be avoided as it causes more
(a) Abnormalities in child birth
(b) Mutations
(c) Recessive alleles to come together
(d) Multiple births

Answer

Answer: (c)

3. When two or more nonallelic gene pairs affect the same character in the same way, it is called
(a) pleiotropy
(b) polygenic inheritance
(c) additive expressivity
(d) total penetrance

Answer

Answer: (b)

4. Polygenes exhibit
(a) Different phenotypes
(b) Different genotypes
(c) Similar genotypes and phenotypes
(d) Both (a) and (b)

Answer

Answer: (a)

5. Raju and Rani are planning a family, but sas each has a brother having the sickle-cell disorder, they are worried that their kids might develop the disorder too. Neither Raju, Rani nor their respective parents have the disorder. They decide to consult a genetic counsellor who conveys them this
(a) its is possible that none of their kids will have the disorder, but blood tests on both of them should be carried out to confirm
(b) all of their children will have sickle-cell disorder
(c) one of four of their children can be expected to have sickle cell
(d) there is no chance of any of their kids having sickle cell

Answer

Answer: (a)

6. Traits which exhibit continuous phenotypic variation are typically determined by this inheritance form
(a) incomplete dominance
(b) polygene inheritance
(c) multiple-allele inheritance
(d) sex-linked inheritance

Answer

Answer: (b)

7. One of the X chromosomes in females is inactivated by
(a) environmental factors
(b) enzymes coded for by mitochondrial DNA
(c) number of dominant genes found on each X chromosome
(d) epigenetic markers

Answer

Answer: (d)

8. Pick the correct statement
(a) Pleiotropic genes exhibit single phenotype
(b) Pleiotropy is caused by a gene that has multiple phenotypic effect
(c) Lethal genes causes the appearance of ancestral characters
(d) Sickle cell anemia is an example of multifactorial inheritance

Answer

Answer: (b)

9. Which of these illustrates pleiotropy?
(a) Matings between earless sheep and long eared sheep always result in short eared offspring
(b) Human cystic fibrosis causes many symptoms from respiratory distress to digestive problems
(c) Wheat kerneis can range from white to red in color, a trait governed by multiple genes
(d) The genes for scarlet eyes and hairy body in fruit flies are located on the same chromosome

Answer

Answer: (b)

10. Morphan’s syndrome is as a result of
(a) Polygene
(b) Pseudogene
(c) Modifier gene
(d) Pleiotropic gene

Answer

Answer: (d)