What are the structures called that give an
appearance as ‘beads-on-string’ in the chromosomes
when viewed under electron microscope?
(a) Genes (b) Nucleotides
(c) Nucleosomes (d) Base pairs

1 Answer

Answer :

Nucleosomes

Related questions

Description : Name the green dot like structures in some cells observed by a student when a leaf peel was viewed under a microscope. What is this green colour due to? -Biology

Last Answer : The green dot-like structures in some cells observed by a student when a leaf peel is viewed under a microscope are chloroplasts. The green colour is due to the presence of green pigment, chlorophyll.

Description : What is viewed through an electron microscope? (1) Electrons and other elementary particles (2) Structure of bacteria and viruses (3) Inside of human stomach (4) Inside of the human eye

Last Answer : (2) Structure of bacteria and viruses Explanation: Electron microscopes are used to observe a wide range of biological and inorganic specimens including microorganisms, cells, large molecules, ... microscope because electrons have wavelengths about 100,000 times shorter than visible light photons.

Description : What is viewed through an electron microscope? (1) Electrons and other elementary particles (2) Structure of bacteria and viruses (3) Inside of human stomach (4) Inside of the human eye

Last Answer : Structure of bacteria and viruses

Description : The _____ microscope would be used to view cell structures within ultrathin sections of cells. a. scanning electron b. transmission electron c. bright-field d. dark-field

Last Answer : b. transmission electron

Description : When viewed under a microscope a sample of tissue reveals striations and long thin fibers that contain many nuclei and mitochondria. What type of tissue is most likely being viewed?

Last Answer : Need answer

Description : Which one of the following pairs of plant structures has haploid number of chromosomes? (a) Nucellus and antipodal cells (b) Egg nucleus and secondary nucleus (c) Megaspore mother cell and antipodal cells (d) Egg cell and antipodal cells

Last Answer : d) Egg cell and antipodal cells

Description : What can a rolling pearl mean?

Last Answer : Rolling pearls mean you keep a painful secret. This is true, say, a dream, not a real roll of pearls. :) 

Description : Skeletal muscles have a striped appearance under the microscope and hence called____mucles.

Last Answer : Skeletal muscles have a striped appearance under the microscope and hence called____mucles.

Description : Who viewed moving objects from pond water his microscope and named them animalcules?

Last Answer : robert hooke

Description : What is the term used for a segment of DNA with one or more genes in the centre and the twoends carrying inverte d repeat sequences of nucleotides? A- Plasmid B- Transposon C- Insertion sequence D- None of these

Last Answer : Transposon

Description : What is the smallest unit of heredity? Page 49A. Chromosomes B. Gene (Answer) C. Nucleotides D. none

Last Answer : B. Gene (Answer)

Description : What is not True for DNA in prokaryotes a) present in the form of a compact structure called nucleoid b) the coils are maintained by non-histone basic proteins c) found in cytoplasm in a supercoiled condition d) packaged as nucleosomes along with histones

Last Answer : b) the coils are maintained by non-histone basic proteins

Description : Stem and loop structures are A- proteins that help partially denatured enzymes to recover their native configuration B- structures in DNA caused by inverted repeats C- structures at the ends of linear eukaryotic DNA molecules D- the bonds between adjacent DNA nucleotides in the same strand

Last Answer : structures in DNA caused by inverted repeats

Description : What are nucleosomes? What are they made of?

Last Answer : Ans:These are units of chromatin. They consists of 8 Histone proteins belonging to 4 types known as H2A, H2B, H3, H4 and two coils of DNA. 

Description : Which one of the following pairs is mismatched? a. Protein - amino acids b. Nucleic acid - nucleotides c. Fats - glycogen d. Starch - glucose

Last Answer : c. Fats - glycogen

Description : If a person looking through microscope at the full moon, how would the appearance of moon be changed by covering of objective lens?

Last Answer : Ans. He will observe the full image but its brightness will be reduced. In other word, the intensity of light will decreased.

Description : (a) granular structure (b) first observed under the electron microscope as dense particles by Geprge Palade ( c ) composed of RNA and proteins not sur

Last Answer : (a) granular structure (b) first observed under the electron microscope as dense particles by ... Nucleolus B. Ribosomes C. Cristae D. Chloroplast

Description : Under the electron microscope, you observe a cell with three different types of large organelles, each bounded by two membranes. The cell is most likely (a) A plant (b) An animal (c) A fungus (d) A bacterium

Last Answer : Ans:(a)

Description : Which of the statements give below is correct with respect to frameshift mutation a) a single nucleotide base change, insertion, or deletion of the genetic material b) Glutamine is replaced by valine c) ... or deletions of a number of nucleotides in a DNA sequence that is not divisible by three.

Last Answer : d) insertions or deletions of a number of nucleotides in a DNA sequence that is not divisible by three.

Description : A major problem with complex pricing structures is that they A)fail to generate the level of revenues needed by an organisation. B)confuse customers and lead to customer dissatisfaction. C) ... to regulation by governmental agencies. D)are almost always viewed as being deceptive by customers.

Last Answer : B)confuse customers and lead to customer dissatisfaction.

Description : Which type of microscope is used to study extremely small things, such as cell structures by passing a beam of electrons through an object?

Last Answer : optical microscope

Description : Differentiate between the following pairs: (a) Telemeter and Multimeter: (b) Perimeter and Altimeter (c) Periscope and Microscope (d) Nucleon and Photon (e) Cusec and Comet

Last Answer : (a) Telemeter and Multimeter: Telemeter is used to convey the physical statistics to a distance, while a multimeter is a complex device, having a potentiometer and ammeter. (b) Perimeter and Altimeter Perimeter is ... packet. (e) Cusec and Comet Cusec is a measure of flow, while comet is an object.

Description : Condensation of chromosomes and appearance of astral rays occur during:-

Last Answer : Condensation of chromosomes and appearance of astral rays occur during:- A. Prophase B. Metaphase C. Anaphase D. Telophase

Description : What are the chromosomes that are identical in shape and appearance that code for the same characteristics?

Last Answer : martenal and partenal

Description : What are the chromosomes that are identical in shape and appearance that code for the same characteristics?

Last Answer : martenal and partenal

Description : Genes located on X-chromosomes are called

Last Answer : Genes located on X-chromosomes are called A. Sex influnced B. Sex limited C. Sex linked D. Maternal genes

Description : $ Those genes which are present on "Y" chromosomes of human beings are called holandric genes. ! Holandric genes are present both in men as well as wo

Last Answer : $ Those genes which are present on "Y" chromosomes of human beings are called holandric genes. ! Holandric ... wrong D. If both As and R are wrong.

Description : Appearance of welded structures with respect to riveted structures is a. Smooth b. Rough c. Same d. None

Last Answer : a. Smooth

Description : The common features of introns include all the following except (A) The base sequence begins with GU (B) The base sequence ends with AG (C) The terminal AG sequence is preceded by a purine rich tract of ten nucleotides (D) An adenosine residue in branch site participates in splicing

Last Answer : Answer : C

Description : Although each specific tRNA differs from the others in its sequence of nucleotides, all tRNA molecules contain a base paired stem that terminates in the sequence CCA at (A) 3′ Termini (B)5′ Termini (C) Anticodon arm (D) 53 ′′ -Termini

Last Answer : Answer : A

Description : Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by (a) base-sugar-phosphate (b) base-sugar-OH (c) (base-sugar-phosphate)n (d) sugar-phosphate.

Last Answer : (a) base-sugar-phosphate

Description : Where are genes located on chromosomes? -Biology

Last Answer : answer:

Description : What Traits controlled by genes located on sex chromosomes are what kind of traits?

Last Answer : If a gene is found on the X chromosome (and, less commonly onthe Y chromosome), it is said to be asex-linked trait.There are about 1,098 human X-linked genes. Most of them codefor ... blindness.X-linked genes are also responsible for a common form ofbaldness referred to as "male pattern baldness".

Description : What happens to the genes when 2 chromosomes embrace?

Last Answer : What is the answer ?

Description : What is A situation in which genes are attached to an organisms sex chromosomes the sex of an organism influences the expression of a gene?

Last Answer : s.e.x linked

Description : What Traits controlled by genes located on sex chromosomes are what kind of traits?

Last Answer : If a gene is found on the X chromosome (and, less commonly onthe Y chromosome), it is said to be asex-linked trait.There are about 1,098 human X-linked genes. Most of them codefor ... blindness.X-linked genes are also responsible for a common form ofbaldness referred to as "male pattern baldness".

Description : Map of genome showing relative positions of genes and or markers on chromosomes

Last Answer : Ans. Genetic map

Description : Polyploidy arises due to change in the (1) number of chromatids (2) structure of genes (3) number of chromosomes (4) structure of chromosomes

Last Answer : (3) number of chromosomes Explanation: An organism having more than two sets of homologous chromosomes is known as polyploid and the phenomenon polyploidy. Polyploidy refers to a numerical change in ... due to abnormal cell division, either during mitosis, or commonly during metaphase I in meiosis.

Description : Genes, the hereditary units, are located in the – (1) nuclear membrane (2) chromosomes (3) lysosomes (4) cell membrane

Last Answer : (2) chromosomes Explanation: A chromosome is an organized structure of DNA and protein found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements ... an organism's genetic information; some species also contain plasrnids or other extrachromosomal genetic elements.

Description : Write note on (a) DNA (b) chromosomes (c) Genes 

Last Answer : (a) DNA  Deoxyribonucleic acid, or DNA, is a molecule that contains the instructions an organism needs to develop, live and reproduce.  These instructions are found inside every cell ... acts as instructions to make molecules called proteins  Genes are located on chromosomes 

Description : The colour blindness is more likely to occur in males than in females because (a) the Y-chromosome of males have the genes for distinguishing colours (b) genes for characters are located on the sex- chromosomes (c) the trait is dominant in males and recessive in females (d) none of these.

Last Answer : (b) genes for characters are located on the sex- chromosomes

Description : A woman with two genes for haemophilia and one gene for colour blindness on one of the X' chromosomes marries a normal man. How will the progeny be? (a) 50% haemophilic colour-blind sons ... ). (c) All sons and daughters haemophilic and colour- blind. (d) Haemophilic and colour-blind daughters.

Last Answer : (b) 50% haemophilic daughters (carrier) and 50% colour blind daughters (carrier).

Description : Independent assortment of genes does not take place when (a) genes are located on homologous chromosomes (b) genes are linked and located on same chromosome (c) genes are located on non-homogenous chromosome (d) all of these.

Last Answer : genes are linked and located on same chromosome

Description : Which of the following statements is not true of two genes that show 50% recombination frequency? (a) The gene show independent assortment. (b) If the genes are present on the same chromo- some, they ... every meiosis. (c) The genes may be on different chromosomes. (d) The genes are tightly linked.

Last Answer : (b) If the genes are present on the same chromo- some, they undergo more than one cross-overs in every meiosis.

Description : In a test cross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates (a) the two genes are linked and present on the ... two genes are located on two different chromosomes (d) chromosomes failed to separate during meiosis.

Last Answer : (a) the two genes are linked and present on the same chromosome

Description : What map unit (centimorgan) is adopted in the construction of genetic maps? (a) A unit of distance between genes on chromosomes, representing 50% cross over. (b) A unit of distance between two ... 100% cross over. (d) A unit of distance between genes on chromosomes, representing 1% cross over.

Last Answer : (d) A unit of distance between genes on chromosomes, representing 1% cross over.

Description : The genes controlling the seven pea characters studied by Mendel are now known to be located on how many different chromosomes? (a) Seven (b) Six (c) Five (d) Four

Last Answer : Four

Description : Two plants can be conclusively said to belong to the same species if they (a) have more than 90 percent similar genes (b) look similar and possess identical secondary metabolites (c) have same number of chromosomes (d) can reproduce freely with each other and form seeds.

Last Answer : (d) can reproduce freely with each other and form seeds

Description : Polyploidy arises due to change in the (1) number of chromatids (2) structure of genes (3) number of chromosomes (4) structure of chromosomes

Last Answer : number of chromosomes

Description : Genes, the hereditary units, are located in the (1) nuclear membrane (2) chromosomes (3) lysosomes (4) cell membrane

Last Answer : chromosomes