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BiologyClass 12CBSE

Explain T5 exonuclease activity in simple short points

T5 exonuclease is an enzyme that digests DNA from its ends and produces dNMPs and short oligonucleotides.The diagram shows T5 exonuclease breaking DNA from the ends and producing dNMPs and short oligos.T5 Exonuclease Activity:Starting material – different DNA end structures used as substratesDNA – doub

BiologyClass 12CBSE

Explain palindromic sequence in DNA

A palindromic sequence is a DNA sequence that reads the same in the 5′ to 3′ direction on both complementary strands.Palindromic Sequence:5′ to 3′ strand – top DNA strand direction3′ to 5′ strand – bottom DNA strand directionGAATTC</strong

BiologyClass 10CBSE

Explain gene therapy using adenovector

Gene therapy uses a vector to deliver a correct gene into cells to treat a genetic disorder.Gene Therapy Using Adenovector:Adenovector – virus-based carrier used to deliver the correct geneCorrect gene – healthy gene inserted into the vector<stron

BiologyClass 10CBSE

Explain human insulin production using recombinant DNA technology

Human insulin is produced by inserting the human insulin gene into bacterial plasmid DNA, allowing bacteria to make insulin.Human Insulin Production:Human pancreas cell – source of the insulin-producing geneDNA – genetic material containing the insulin gene<li data-list-item-id="e592633b50c5011dc28097888

BiologyClass 12CBSE

Explain the stages of menstrual cycle

The menstrual cycle has menses, proliferative phase, ovulation, and secretory phase, controlled mainly by FSH, LH, estrogen, and progesterone.Various Stages of Menstrual CycleFollicular phase – first half of the cycle; follicle developsLuteal phase – second half of the cycle; corpus luteum forms<li data-

BiologyClass 12CBSE

Explain a mature Graafian follicle in simple short points

A mature Graafian follicle contains an oocyte, zona pellucida, antrum, granulosa cells, theca interna, theca externa, and basal lamina.A Mature Graafian Follicle:Basal lamina – thin supporting layer around granulosa cellsTheca externa – outer protective/supportive layer<li data-list-item-id="e109b79255cf

BiologyClass 12CBSE

Explain corpus luteum formation and function in simple short points

The corpus luteum forms after ovulation from the ruptured Graafian follicle and secretes progesterone.Corpus LuteumOvary – female organ where ova and follicles developPrimordial follicle – earliest stage of folliclePrimary follicle</strong

BiologyClass 12CBSE

Explain the histologic architecture of Graafian follicle in simple short points.

The diagram shows the structure of a mature Graafian follicle inside the ovary, including the ovum, follicular fluid, granulosa cells, and theca layers.Membrana granulosa cells: Cell layer lining the follicleTheca interna: Inner theca layer that helps produce hormones<st

BiologyClass 12CBSE

Explain the diagrammatic section view of ovary in simple short points

The ovary contains developing follicles, Graafian follicle, ovum, blood vessels, and corpus luteum.Blood vessels – supply blood to the ovaryPrimary follicle – early developing follicleTertiary follicle showing antrum – mature developing follicle with fluid-filled space<li data-list-item-id="edada13c

BiologyClass 11CBSE

Explain the female reproductive system internal organs

The female reproductive system includes the ovaries, fallopian tubes, uterus, cervix, and vagina.Uterine fundus – upper rounded part of the uterusUterine cavity – hollow space inside the uterusEndometrium – inner lining of the uterus<li data-list-it

BiologyClass 10CBSE

Explain the epiglottis and surrounding throat structures

The epiglottis is a flap that prevents food from entering the trachea during swallowing.Epiglottis:<ul style="-webkit-text-stroke-width:0px;color:rgb(0, 0, 0);font-family:Verdana, Arial, Helvetica, sans-serif;font-size:11px;font-style:normal;font-variant-caps:normal;font-variant-ligatures:normal;font-weight:400;letter-spacing:normal;orphans:2;text-align:start;text-decoration-color:initial;text-decoration-style:initial;text-decoration-thickness:initial;text-indent:0

BiologyClass 10CBSE

Explain the human digestive system shown in the image in simple short points.

The human digestive system includes the mouth, salivary glands, pharynx, esophagus, stomach, small intestine, large intestine, rectum, anus, liver, gallbladder, and pancreas.Human Digestive SystemParotid gland and duct – produces salivaSublingual and submandibular glands and ducts – produce saliva<li dat

BiologyClass 10CBSE

Explain the buccal cavity of man shown in the image in simple short points

The buccal cavity contains lips, teeth, gums, tongue, palate, uvula, and tonsils.Buccal Cavity of ManLips – outer opening of the mouthGingiva / gums – tissue around the teethHard palate – front bony roof of the mouth<li data-

BiologyClass 10CBSE

Explain the large intestine and its various parts

The large intestine includes the cecum, appendix, colon, sigmoid colon, rectum, and anus.Large Intestine and Its Various Parts<p style="-webkit-text-stroke-width:0px;color:rgb(0, 0, 0);font-family:Verdana, Arial, Helvetica, sans-serif;font-size:11px;font-style:normal;font-variant-caps:normal;font-variant-ligatures:normal;font-weight:400;letter-spacing:normal;orphans:2;text-align:start;text-decoration-col

BiologyClass 10CBSE

Explain the tongue surface and types of lingual papillae shown in the image in simple short points.

The tongue has four main papillae: circumvallate, fungiform, filiform, and foliate papillae.Tongue Surface Showing Lingual PapillaeCircumvallate papillae: large papillae near the back of the tongueFungiform papillae: mushroom-shaped papillae, mostly on the front and sides<li data-list-item-id="eb6f9d4262

BiologyClass 10CBSE

Explain the structure of a tooth shown in the image in simple short points

The image shows the main parts of a tooth, including the crown, neck, roots, and internal tissues.Parts of Tooth:Crown – visible upper part of the toothNeck – narrow part near the gumRoots – lower part fixed in the jaw bone<l

BiologyClass 10CBSE

Explain the layers of the alimentary canal wall shown in the image in simple short points

The alimentary canal wall has four main layers: mucosa, submucosa, muscularis externa, and serosa.Alimentary Canal Wall:Lumen – central hollow space where food passesMucosa – inner liningMuscularis mucosa – thin muscle layer under mucosaSubmucosa – support layer with vessels and nervesSubmucosal plexus – nerve network in submucosaCircul

BiologyClass 10CBSE

What are the 4 main parts of the stomach?

The stomach is a muscular, J-shaped organ that stores food, mixes it with digestive juices, and sends it to the small intestine.Parts of the stomach:Cardia – where food enters from the esophagus.Fundus – upper dome-shaped part.Body</strong

BiologyClass 1CBSE

Clothes we wear in winter

In winter we wear warm, woollen clothes like sweaters, jackets, shawls, and caps to protect us from the cold.

BiologyClass 1CBSE

Why is air important?

Air is important because:All living things breathe air to stay alive.Air helps plants make food.Air moves windmills and boats.

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