Home
Class 12
BIOLOGY
Read the following statements and choose...

Read the following statements and choose the correct statements. A. Cilia and flagella are covered with plasma membrane. B. Centrioles form the basal body of both cilia as well as flagella. C. Approximately 2 m long thread of DNA is distributed among 46 pairs of chromosomes in a single human cell. D. Movement of proteins and RNA into or out of nucleus occurs through nuclear pores.

A

A, B, & D

B

A, B & C

C

B, C & D

D

A, C & D

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • Mock test 19

    AAKASH INSTITUTE|Exercise EXAMPLE|33 Videos

  • MOCK TEST 21

    AAKASH INSTITUTE|Exercise EXAMPLE|27 Videos

Similar Questions

Explore conceptually related problems

Read the following statements carefully and choose the correct statements. A. In a transcription unit, the promoter located at the 5' end of coding strand B. The single strand DNA having the polarity 5' rarr 3' is the template strand C. RNA polymerase binds to the operator during transcription. D. Single base DNA differences occur in humans are called Single Nucleotide Polymorphism (SNPs).

Read the following statements and find out the incorrect statements. a. Ovules generally differentiate single megaspore mother cell (MMC) in the chalazal region of the nucellus. b. The MMC undergoes reduction division and produces four megaspores. c. In a majority of angiosperms, one of the megaspore is degenerated while the other three remains functional. d. The nucleus of the functional megaspore divides mitotically three times and form 2-nucleate, 4-nucleate and later 8-nucleate stages of the embryo sac. e. These mitotic division are strictly free nuclear, that is, nuclear division are immediately follwed by cell wall formation.

In the following questions , a statement of assertion (A) is followed by a statement of reason (R). A: Basal body of cilia and flagella is formed by centriole in animal cells R: Centriole shows 9 + 2 arrangement of microtubules.

Read the following statements and find out the incorrect statements. (a) Movement is one of the significant features of living beings-both plants and animals. b. Streaming of protoplasm in the unicellular organisms like Amoeba is a simple form of movement. c. Movement of cilia, flagella and tentacles are shown by Euglena, Paramoecium and Hydra respectively. d. Human beings can move limbs jaws, eyelids, tongue and ear pinna etc. e. Locomotion is generally for search of food, shelter, mate, suitable breeding grounds and favourable climatic conditions or to escape from enemy/predators.

Read the following statements carefully - (A) The lipid component of the plasma membrane mainly consists of phosphoglycerides. (B) Polar molecules can pass through the lipid bilayer of the plasma membrane, therefore they do not require carrier proteins to facilitate their transport. (C ) The secondary wall is capable of growth and it is formed on the outer side of the primary wall. (D) Quasifluid nature of lipid enables the lateral movement of proteins within the overall lipid bilayer of the plasma membrane. (E) Middle lamella glues the different neighbouring cells together. How many statements are incorrect?

Consider the following statement and choose the incorrect option. a. Large and more numerous nucleoli are present in cells actively carrying out protein synthesis. b. Nuclear pores allow bidirectional movement of molecules. c. Cytoskeleton is a glycolipid structure for mechanical support , motility and maintenance of the shape of the cell. d. Steroidal hormones are synthesized by Golgi complex .

Read the following four statements (i -iv) (i) Every chromosome essentially has a primary constriction or the centromere. (ii) During different stages of cell division, cells show structured chromosomes in place of the nucleus . (iii) Nuclear pores are the passages through which movement of RNA and Protein takes place in one direction between the nucleus and cytoplasm. (iv) Chromatin contains DNA, some basic proteins called histone adn RNA only . How many of the above statement are