What is the ploidy of a diploid cell in the G2 phase of mitosis?
2n
Key Terms
What is the ploidy of a diploid cell in the G2 phase of mitosis?
2n
If the number of chromosomes are four, what are the number of chromatids in prophase?
8
What are Balbiani rings?
The bands of polytene chromosomes become enlarged at certain times to form swellings called puffs. In the regions of puffs, the chromonemata uncoil...
Which form of nitrogen does rhizobium convert?
Rhizobium converts atmospheric nitrogen.
WHat is a wetland?
Wetland is a flooded ecosystem where oxygen free processes prevail.
Which phytohormone increases the shelf life of fruits?
Cytokinin
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| Term | Definition |
|---|---|
What is the ploidy of a diploid cell in the G2 phase of mitosis? | 2n |
If the number of chromosomes are four, what are the number of chromatids in prophase? | 8 |
What are Balbiani rings? | The bands of polytene chromosomes become enlarged at certain times to form swellings called puffs. In the regions of puffs, the chromonemata uncoil and open out to form many loops.The puffs indicate the site of active genes where mRNA synthesis takes place. These loops are called Balbiani rings |
Which form of nitrogen does rhizobium convert? | Rhizobium converts atmospheric nitrogen. |
WHat is a wetland? | Wetland is a flooded ecosystem where oxygen free processes prevail. |
Which phytohormone increases the shelf life of fruits? | Cytokinin |
In MOET fertilised eggs are removed surgically at 8-32 cell stage and transferred to surrogate mother. True/false? | False. | In MOET fertilised eggs are removed non-surgically at 8-32 cell stage and transferred to surrogate mother. |
Sodium citrate is used as a chelating agent to clot blood. True/false? | True |
Blood without clotting factors is called serum. True/false? | False. It is blood plasma without fibrinogens. |
When was the first animal cloned? | 1996 (dolly) |
Knockout mouse is genetically modified by replacing its existing gene with an artificial gene.True/false? | True |
How many parotid, submaxillary and sublingual glands are present? | One pair each |
Glomerular filtration rate is filtrate formed by each kidney per minute and it is 125 ml/min. True/false? | False. Glomerular filtration rate is filtrate formed by both kidney per minute and it is 125 ml/min. |
Which part of male reproductive system is analogous to labia majora of females? | Scrotum |
What are the four key stages of anaerobic digestion to form biogas? | Hydrolysis, acidogenesis, acetogenesis and methanogenesis |
Biocenology is the study of | Community, it is the study of interaction of living and non living things. |
In flowering plants archesporium gives rise to | Wall and sporogenous tissue |
Agar agar is obtained from | Red algae |
The most primitive and advanced type of placentations are , respectively , | Superficial and basal placentation |
In the process of aerobic respiration, how many ATP molecules will be generated from one molecule of triose phosphate? | 20 |
Which one is the precursor of ethylene? | Methionine |
Radish is a perennial plant, true/false? | False. It is annual/biennial. |
Mango is an annual plant. True/false? | False. Mango is a perennial plant. |
WHat is the concentration of methane among the major greenhouse gases? | 20% |
What is the concentration of CFCs among the major greenhouse gases? | 14% |
Nucleases and amylopsin are found in which digestive fluids? | Pancreatic juice |
What event that is likely to occur in the blood entering pulmonary capillaries? | Reverse chloride shift |
Angiotensinogen II is a vasodilator. True/false? | False. It is a vasoconstrictor. |
Mandible is an unpaired cranial bone. True/false? | False. It is an unpaired facial bone. Sphenoid bone is an unpaired cranial bone. |
The somatic neural system of the peripheral nervous system relays information between | CNS and skeletal muscles. |
Autonomous neural system relays information between | CNS and smooth muscles |
Mule is formed by cross hybridisation. True/false? | False. It is formed by interspecific hybridisation. |
What is the role of bicarbonate ions in stomach? | Protection of stomach wall from acid along with mucus |
The mucus and bicarbonates in the intestinal mucosa are rescreted by | Pancreas |
Which order does the plant Porella belong to? | Bryophyte (liverwort) |
Polyethylene glycol enhances or induces fusion of protoplasts, true/false? | True |
Sodium chloride enhances or induces fusion of protoplasts, true/false? | True |
The UN Conference of Parties on climate change in the year 2011 was held in which country? | South Africa |
In ETS, Oxygen acts as an electron acceptor only. True/false? | False. Oxygen acts as the final electron acceptor and also as a hydrogen ion acceptor. |
Cyt c is small mobile protein attached to outer surface of inner membrane of mitochondria, true/false? | True. |
Is equisetum heterosporous or homosporous? | Homosporous |
Is Adiantum heterosporous or homosporous? | Homosporous |
All the mammals have body hair without any exceptions. True/false? | False. |
Do chondrichthyes have paired appendages? | Yes |
Removal of proximal convoluted tubule from the nephron will result in | Dilute urine |
Sertoli cells are involved in release of ABP, true/false? | True. (ABP: Androgen binding protein) |
Sertoli cells inhibits the secretion of anti mullerian hormone. True/false? | False. They release anti mullerian hormone. |
Presence of which of the following hormone in urine represents fertile period in a female during her fertile age? | Leutinizing hormone |
Is tiger cat a placental or marsupial mammal? | Marsupial mammal |
A characteristic mushroom shaped gland is present in which segments of cockroach? | 6 to 7 |
Photoreceptors in human eye are depolarised during darkness and become hyperpolarized in response to the light stimulus. True/false? | True |
Restorage of nucleocytoplasmic ratio is performed in | M phase |
The parotid, sub-maxillary and sub-lingual salivary glands are located just outside the buccal cavity and secrete salivary juice into the buccal cavity. True/false. | True |
Chloroplasts are aligned with their flat surface, parallel to the tangential wall of cells when 1) Moderate incident light comes 2) Diffused light comes 3) Plant is kept in strong light 4) `When intermittent strong and diffused light is given | 2 |
What condition of chloroplast is known as epistrophe? | Chloroplast align parallel to the walls of mesophyll cells (mainly palisade cells) when intensity of light is minimum, to get more and more of light. |
What is parastrophe? | When the intensity of light is maximum the chloroplast gets aligned perpendicular to the mesophyll cells to avoid photooxidation of chlorophyll a molecule This condition is called Parastrophe. |
What is the alignment of chloroplast is medium light called? | Apostrophe |
Name all the unpaired cranial bones. | Frontal Occipital Sphenoid Ethmoid |
Name the unpaired facial bones. | Vomer Mandible Hyoid |
Are conidia arranged basipetally on conidiospores? | Yes |
WHat is a hypogynous ovary? | Superior ovary |
What type of placentation does mustard have? | Parietal placentation |
In Nepenthes, the coiled tendril like structure is the modification of | Petiole |
Tyloses are present in lumen of tracheids. True/false? | False. They are present only in vessels. |
Epithem cells are | Loosely arranged parenchyma cells below the hydathodes Epithem refers to the loosely arranged cells at the dead end of veins (hydathodes) through which water oozes out as a dilute solution of minerals under the influence of positive root pressure. This process is called as guttation. |
During daytime, the opening of stomata involves influx of Cl– ions inside the guard cells. True/false | True |
During daytime, the opening of stomata involves increase in the concentration of malic acid in guard cells. True/false? | False. Potassium malate is formed in guard cells, not malic acid. |
The first electron acceptor in cyclic photophosphorylation is | FeS |
In C4 plants, PEP carboxylase and RuBisCO enzymes are present in which parts of cells? | Cytosol and stroma |
Cytochrome c-oxidase complex contains | Cyt a, Cyt a3, Cu centres |
Control of metabolism is a function of DNA. True/false | False |
In prokaryotes during DNA replication, which enzyme has exonuclease activity in both 5'----> 3' and 3' ---> 5' directions? | DNA polymerase 1 |
The number of genes present on the human - ``Y''- chromosome, is | 231 |
Sebaceous gland secretion mainly contains | Sterols and hydrocarbons |
Name an inorganic cofactor present in cytochrome oxidase. | Cu2+ |
Enamel is secreted by A which are B in origin. | A- ameloblast cells | B- ectodermal` |
Filiform papillae are the smallest papillae. true/false? | True |
The protein coat around the core of HIV is made of | P24 |
What is the genetic material of hepatitis A virus? | ss Rna |
The ions essential for cardiac muscle contraction are | Na+, Ca2+ |
Genu and splenium are the parts of | Corpus callosum |
Free nerve endings of skin receptors in humans are concerned with sense of | Pain |
Destruction of –––I––– secreting –––II––– of substantia nigra leads to Parkinson's disease | I- dopamine | II- Pars compacta |
What is the function of somatostatin? | Suppresses release of hormones from pancreas |
WHat is the function of Enterogastrone? | Slows gastric contraction |
What is the function of Enterocrinin? | Stimulates crypts of lieberkuhn to release enzymes in pancreatic juice |
What is the function of secretin? | Releases bicarbonate in pancreatic juice |
Tunica media is thick in arteries and thin in veins. True/false? | True |
Selaginella is a bryophyte. True/false? | False. It is a pteridophyte. |
Semi–autonomous cell organelles and bacteria resemble with each other in their double membrane structure. True/false? | False. Bacteria don't have double membrane structure. |
In which stage of cell cycle does duplication of centrioles occur? | S phase |
Root nodules are formed due to division and growth of | Cortex and pericycle cells |
Aloe belongs to the family Solanaceae. True/false? | False. It is a monocot. |
C4 acid is converted into C3 acid and vice–versa in sugarcane leaf in | Malic acid (4C) ------> Pyruvate (3C) (Bundle sheath cell) PEP (3C) ------> Malic acid (4C) (Mesophyll cell cytoplasm) |
Is barley a monocot or a dicot? | A monocot |
Orchid seeds are monocot and endospermic. True/false? | False. They are non endospermic. |
In Turner's syndrome, the individual has the chromosome complement as 45 + XO. True/false? | False. | THey have genetic complement 44 + XO |
Which enzyme is also known as Kornberg enzyme? | DNA Polymerase 1 |
Jacobson's organ is found in | Some reptiles |
Weberian ossicles are found in | Some osteichthyes |
Organ of Bojanus is found in | Molluscs |
What is the excretory structure of Nereis? | Nephridia |
What type of excretory structure is present in Lepisma? | Malpighian tubules |
Palaemon is the scientific name of | Shrimp |
Green glands are found in Palaemon. True/false? | True |
Approximately, how much blood is pumped out by both the ventricles, per cardiac cycle? | 140 ml |
What type of junctions are present in intercalated disc of cardiac muscles? | Gap junction |
Amniotic fluid extracted for the purpose of amniocentesis actually contains | Exfoliated somatic cells from foetus |
Number of nitrogen in adenine molecule is | 5 |
Antianxiety drug includes amphetamines. True/false? | False. They comtain barbiturates. |
The action of adrenaline on heart is via which secondary messenger? | cAMP |
Based on photoperiod, what type of plant is rice? | Short day plant |
Based on photoperiod, what type of plant is soyabean? | Short day plant |
Based on photoperiod, what type of plant is tobacco? | Short day plant |
Based on photoperiod, what type of plant is tomato? | Day neutral plant |
Based on photoperiod, what type of plant is henbane? | Long day plant |
Based on photoperiod, what type of plant is sugarbeet? | Long day plant |
Based on photoperiod, what type of plant is cucumber? | Day neurtal plant |
Based on photoperiod, what type of plant is potato? | Long day plant |