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  Apomixis is the event of an asexual reproductive process taking place instead of the normal sexual processes which involve reduction division and fertilization. This process is widely observed amongst higher plants and such plants are said to be apomictic. Most commonly observed in Compositae, Gramineae, Rutaceae. 1. In many laboratories, active research is on to comprehend the genetics of apomixis (a) Apomixis generates genetically different individuals (b) Apomixis is the method to produce seeds without fertilization (c) Hybrid plants are directly formed by apomixis (d) Transfer of apomictic genes into hybrid varieties that shall prevent hybrid vigour loss over the years Answer: (d) 2. Apomixis is a form of (a) Vernalization (b) Parthenogenesis (c) Parthenocarpy (d) None of the above Answer: (b) 3. Geitonogamy and autogamy both are prevented in which one of these? (a) Cucumber (b) Maize (c) Castor (d) Papaya Answer: (d) 4. In plants, apomixis pertains to plant development (a) f...

  Hypothyroidism is a condition wherein there is excessive secretion of the thyroid hormones due to underactive of the thyroid gland or due to the formation of nodules. The impact of which is adverse. It affects the physiological functions of the body. More commonly, hyperthyroidism is observed in females. MCQs on Symptoms of Hyperthyroidism In Females Explore important MCQs on hyperthyroidism here. 1. Rapid heartbeat, shortness of breath, high body temperature are the symptoms of ___________. (a) Thyroid crisis (b) Thyroid storm (c) Thyroid failure (d) Thyroid death Answer: (b) 2. Thyroid disorders are often mistaken for this condition. (a) Pregnancy (b) Menopause (c) Crohn’s disease (d) Posttraumatic stress disease Answer: (b) 3. A 35-years-old female present to the hospital with symptoms of sudden onset of pain in the anterior neck spreading to the jaw from the past 2 days. Other than these symptoms, she also reported a full recovery from ‘a cold a week ago’. Whic...

  The thread-like fine structures found in the nucleus carrying genetic instructions that are passed from one to another generation during the process of reproduction are chromosomes. These chromosomes have a critical role to play in the process of cell division, variation, heredity, repair, mutation and also regeneration. Explore important MCQs on chromosome structure here. Read on. 1. The least level of chromosome organization is (a) 30nm fibre (b) solenoid (c) nucleosome (d) none of the above Answer: (c) 2. This has the largest number of chromosomes (a)  Pisum sativum (b)  Giant redwood tree (c)  Haplopappus gracilis (d)  Ophioglossum reticulatum Answer: (d) 3. A chromosome with a very short arm and a very long arm is referred to as (a) Metacentric (b) telocentric (c) Acrocentric (d) Sub-metacentric Answer: (c) 4. A chromosome is the thickest during (a) anaphase (b) prophase (c) interphase (d) metaphase Answer: (d) 5. The diagrammatic representation of karyot...

  The cell nuclei is the site for transcription in eukaryotes. The process then advances to the three sequential phases – initiation, elongation and termination. In order for the eukaryotes to bind to the promoter region and then help recruit the appropriate polymerase. However, the polymerase that is responsible for transcribing mRNA is RNA polymerase II. 1. The enzyme required for transcription is (a) RNAase (b) DNA polymerase (c) RNA polymerase (d) Restriction enzymes Answer: (c) 2. Transcription is the transfer of genetic information from (a) DNA to RNA (b) DNA to mRNA (c) mRNA to tRNA (d) tRNA to mRNA Answer: (b) 3. Sigma factor is a component of (a) DNA ligase (b) DNA polymerase (c) Endonuclease (d) RNA polymerase Answer: (d) 4. The main function of tRNA with regards to protein synthesis is (a) Proofreading (b) identifies amino acids and transports them to ribosomes (c) Inhibits protein synthesis (d) all of the above Answer: (b) 5. One end of tRNA matches genetic code in thre...

  A type of simple permanent tissue, parenchyma makes up for the major part of the ground tissues in plants. They are living tissues and are non-vascular in nature composed of undifferentiated cells that are altered to carry out numerous functions. Explore important MCQs for NEET from parenchyma tissue here. MCQs On Parenchyma Tissue 1. Mostly, the flesh of the fruit is made of ___________. (a) Collenchyma (b) Meristem (c) Collenchyma (d) Parenchyma Answer: (d) 2. In plants, the most common ground tissue is___________. (a) Cortex (b) Epidermis (c) Collenchyma (d) Parenchyma Answer: (d) 3. From mature parenchyma, plant regeneration can occur as__________. (a) there are no cell walls (b) they are nucleate (c) they can dedifferentiate (d) it forms the bulk of the ground tissue Answer: (c) 4. The plant tissues that are known for photosynthesis, secretion and storage are______. (a) Parenchyma (b) Collenchyma (c) Sclerenchyma (d) Vascular cambium Answer: (a) 5. Simple permanent tiss...

  One of the most common disorders of the thyroid gland is the Multinodular goitre(MNG). It is a special condition of the thyroid glands where multiple nodules or lumps form. Goitre is the enlargement of the thyroid gland. Nodules are formed when there is a difference in the growth rate in various parts of the thyroid gland. Explore important MCQs here. 1. Which of the following disease is caused due to the deficiency of iodine? (a) Solitary thyroid nodules (b) Goitre (c) Thyroiditis (d) Thyroid cancer Answer: (b) 2. Which of the following is the main cause for Goitre? (a) Hypothyroidism (b) Hyperthyroidism (c) Cancer of the thyroid gland (d) All of the above Answer: (d) 3. When the progressive enlargement of a multinodular goitre causes symptomatic tracheal compression, the typically preferred treatment management in otherwise good-risk patients is ____. (a) Radioactive iodine treatment (b) Thyroid hormone treatment (c) Iodine treatment (d) Surgical resection of abnormal thyroid A...

  Rhizopus are saprophytic and parasitic fungi. They are commonly known as bread mould. They contain coenocytic hyphae. Rhizopus species are used to produce alcoholic beverages and chemicals. Some of the species are pathogenic to plants and animals. 1.  The cell wall of most of the fungi contains ________. (a) Hemicellulose (b) Chitin (c) Peptidoglycan (d) Cellulose 2.  Absorptive heterotrophic mode of nutrition is present in_______. (a) Pteridophytes (b) Bryophytes (c) Fungi (d) Algae 3.  Zygospore formation is a characteristic feature of_______. (a) Mucour/  Rhizopus (b)  Puccinia (c)  Alternaria (d)  Penicillium 4.  Asexual reproduction in  Rhizopus  is by the formation of_______. (a) Zygospores (b) Motile zoospores (c) Sporangiospores (d) Zoogametes 5.  Which of the following class does  Rhizopus belong to? (a) Ascomycetes (b) Chytridiomycetes (c) Deuteromycetes (d) Zygomycetes 6.  ________ is ...

  Nucleotides play an essential role in metabolic and physiological activities. They are made up of a pentose sugar, a nitrogenous base and one or more terminal phosphate group(s). They are building blocks of DNA and RNA. Other than polynucleotides, ATP, NAD, FAD, etc. are also nucleotides. 1. A phosphodiester bond is present in (a) Nucleic acids in a nucleotide (b) Monosaccharides in a polysaccharide (c) Amino acids in a polypeptide (d) Fatty acids in a diglyceride 2. Uridine present in RNA is (a) nucleotides (b) pyrimidine (c) purine (d) nucleoside 3. Nucleic acids are a polymer of nucleotide monomeric units. Each nucleotide consists of (a) base­-sugar-­OH (b) sugar-­phosphate (c) base­-sugar-­phosphate (d) (base­-sugar­-phosphate) x 4. A DNA segment contains 100 Adenine and 100 cytosines, how many nucleotides are present in the segment? (a) 100 (b) 200 (c) 400 (d) 50 5. Nucleoside contains (a) base-sugar (b) base-phosphate (c) base-sugar-phosphate (d) sugar-phosphate 6. ATP is a...