List of top Questions asked in TS EAMCET

For \( n \in \mathbb{N} \), the largest positive integer that divides \( 81^n + 20n - 1 \) is \( k \). If \( S \) is the sum of all positive divisors of \( k \), then find \( S - k \).

In which of the following organisms, cell wall is not found in any stage?

The sum of all the 4-digit numbers formed by taking all the digits from \(2, 3, 5, 7\) without repetition is

If \( \mathbf{a} = 4\hat{i} + 5\hat{j} - 3\hat{k} \) and \( \mathbf{b} = 6\hat{i} - 2\hat{j} - 2\hat{k} \) are two vectors, then the magnitude of the component of \( \mathbf{b} \) parallel to \( \mathbf{a} \) is:

The half-lives of two radioactive materials A and B are respectively \( T \) and \( 2T \). If the ratio of the initial masses of the materials A and B is 8:1, then the time after which the ratio of the masses of the materials A and B becomes 4:1 is:

If \( (2, -1) \) is the point of intersection of the pair of lines \[ 2x^2 + axy + 3y^2 + bx + cy - 3 = 0 \quad \text{then} \quad 3a + 2b + c = \]

P and Q are the points of trisection of the line segment joining the points \( (3, -7) \) and \( (-5,3) \). If line PQ subtends a right angle at a variable point R, then the locus of R is:

Match the following:

Assertion (A): Endosperm is haploid in Gymnosperms
Reason (R): Female gametophytic tissue acts as endosperm in Gymnosperms

In the following group of plants, sporophytes are dependent on gametophytes.

Match the following:

DNA molecule having the length of 68Å, contains 10\% Adenine. How many number of hydrogen bonds are present between nitrogen bases totally in that DNA?

The following characters are found common to both mitochondria and chloroplast:

Match the following:

Match the following:

Identify the correct statements among the following:

A. RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defense.
B. Bt-toxin gene, CryIIAb controls cotton bollworms.
C. Mycorrhiza helps the plants for more absorption of potassium.
D. Elusion is a technique of extracting separated bands of DNA from agarose gel.

Match the following:

Match the following:

Study the following and pick up the correct statements:

I. Greater biodiversity is found in temperate regions
II. Invasion of alien species is a threat for local species
III. Loris tardigradus is one of the threatened species in our country
IV. A biographic region with significant reservoir of biodiversity that is under threat of extinction from humans is called a sanctuary

Match the following:

List - 1	List - 2
A. Basophils	I. Microscopic police men
B. Eosinophils	II. Macrophages
C. Neutrophils	III. Immunity
D. Lymphocytes	IV. Heparin
	V. Antigen - antibody complexes

Study the following and pick up the correct combinations:

S. No.	Phylum	Larva	Example
I	Annelida	Trochophore	Nereis
II	Mollusca	Veliger	Periplaneta
III	Hemichordata	Tornaria	Balanoglossus
IV	Ctenophora	Dipluerula	Asterias

Match the following:

A) Ornithorhynchus I) Flying fox
B) Pteropus II) Emu
C) Coracias III) Duck-billed platypus
D) Dromaeus IV) Parrot
V) Blue Jay

Flagellum in Polytoma is

Study the following and pick up the correct statements:

I. Opioids are obtained from Cannabis sativa
II. Heroin is obtained by the acetylation of Morphine
III. Barbiturates cause sleeplessness
IV. Benzodiazepines are tranquilizers

Assertion (A): Syngamy in Plasmodium is anisogamy
Reason (R): The gametes are similar in size The correct answer is: Assertion (A) and Reason (R) are correct, but (R) is not the correct explanation of (A).