laboursonline – MCQs, Mock Tests | NTS NTS BIOLOGY CURRENT AFFAIRS SET 1

Cassia fistula is the scientific name of

1. amaltas
2. rose
3. onion
4. tomato

✅ Correct Answer: 1

Phage virus consists of head and

1. thorax
2. neck
3. tail
4. none of these

✅ Correct Answer: 3

Bacteria without any flagella are called

1. monotrichous
2. atrichous
3. peritrichous
4. lophotrichous

✅ Correct Answer: 2

Protists have been evolved from

1. animals
2. plants
3. fungi
4. prokaryotes

✅ Correct Answer: 4

Algae differ from plants in that the sex organs in algae are

1. multicellular
2. unicellular
3. acellular
4. none of these

✅ Correct Answer: 2

Fungi can absorb food from the substrate because the have

1. sporangium
2. spores
3. rhizoids
4. stalk

✅ Correct Answer: 3

A seed may be defined as a fertilized

1. egg
2. ovary
3. ovule
4. embryo

✅ Correct Answer: 3

Platyhelminthes means

1. round worms
2. flat worms
3. tape worms
4. pin worms

✅ Correct Answer: 2

The first land vertebrates were

1. dipnoi
2. amphibia
3. reptilia
4. aves

✅ Correct Answer: 2

All life on planet earth is powered by

1. solar energy
2. thermal energy
3. tidal energy
4. kinetic energy

✅ Correct Answer: 1

Recombinant DNA is introduced in to host cell by means of

1. phage
2. vector
3. bacteria
4. enzyme

✅ Correct Answer: 2

In cystic fibrosis, the patient lacks a gene that codes for trans-membarene carrier of

1. sodium ion
2. carbon dioxide
3. chloride ion
4. potassium ion

✅ Correct Answer: 3

Which gene is located on linkage group number 11 in man

1. sickle cell anemia
2. leukemia
3. albinism
4. all of these

✅ Correct Answer: 4

In birds the sex is determined by the type of

1. sperm
2. autosomes
3. egg
4. none of these

✅ Correct Answer: 3

In RNA nucleotides are attached by

1. peptide bonds
2. hydrogen bonds
3. covalent bond
4. phosphodiester bond

✅ Correct Answer: 4

The chromosome is

1. gene
2. genes + protein
3. DNA + genes
4. gene + protein

✅ Correct Answer: 2

The human body contains water

1. 60-80%
2. 70-90%
3. 75-95%
4. 80-90%

✅ Correct Answer: 2

Environment is a source of

1. food
2. shelter
3. clothing
4. all of these

✅ Correct Answer: 4

Fresh water ecosystem covers

1. 2%
2. 1%
3. 3%
4. 5%

✅ Correct Answer: 2

Foul smell in lake is produced by

1. algae
2. bacteria
3. fungi
4. all of these

✅ Correct Answer: 4

Starch is richly present in

1. onion
2. apple
3. cereals
4. tomato

✅ Correct Answer: 3

Plants having foreign DNA are known as

1. genetic plants
2. recombinant plants
3. cultured plants
4. transgenic plants

✅ Correct Answer: 4

Which of the following kinds of atom do not occur in carbohydrates

1. carbon
2. hydrogen
3. nitrogen
4. oxygen

✅ Correct Answer: 3

The basic framework of all types of membranes are

1. lipoproteins
2. glycoproteins
3. proteoglycans
4. nucleoproteins

✅ Correct Answer: 1

Single membrane bounded organelle is

1. nucleus
2. lysosome
3. ribosome
4. none of these

✅ Correct Answer: 2

Irregular grape like cluster of bacilli is called

1. diplo bacilli
2. strepto bacilli
3. staphylo bacilli
4. none of these

✅ Correct Answer: 3

It is generally accepted that plants arose from ancestral

1. green algae
2. fungi
3. bacteria
4. all of these

✅ Correct Answer: 1

Main energy reserves in the case of green algae are

1. glycogen
2. sucrose
3. glucose
4. starch

✅ Correct Answer: 4

The chief component of the cell wall of the majority of fungi is

1. pectin
2. chitin
3. lignin
4. cellulose

✅ Correct Answer: 2

After pollination the pollens are transferred to which part of the flower

1. ovary
2. style
3. stigma
4. none of these

✅ Correct Answer: 3

Glyoxisomes contain enzymes for

1. glyoxylate cycle
2. glycolate cycle
3. Calvin cycle
4. none of these

✅ Correct Answer: 1

Vacuoles serve to

1. expand the plant cells
2. sites for storage
3. both in expansion and storage
4. non-specific function

✅ Correct Answer: 3

An isolated virus is not considered living since it

1. separate into two parts
2. cannot metabolize
3. rapidly looses its genome
4. all of these

✅ Correct Answer: 2

The predominant phycobilin pigment in cyanobacteria which is of blue colour is

1. phycoerythrin
2. phycocyanin
3. fucocyanin
4. fucoxanthin

✅ Correct Answer: 2

Deafness is caused by misuse of

1. penicillin
2. tetracycline
3. paracetamol
4. streptomycin

✅ Correct Answer: 4

Cell envelope does not include

1. capsule
2. slime layer
3. cell wall
4. cell membrane

✅ Correct Answer: 4

Coenocytes is a fungal body which is

1. multi-nucleate aseptate
2. multi-nucleate septate
3. uni-nucleate septate
4. uni-nucleate aseptate

✅ Correct Answer: 1

Bryophytes are

1. all heterosporous
2. all homosporous
3. mostly homosporus
4. none of these

✅ Correct Answer: 2

Nephridia are excretory organs in

1. round worms
2. lizard
3. earth worm
4. planaria

✅ Correct Answer: 3

Which one is harmful mollusc

1. slug
2. snail
3. oyester
4. star fish

✅ Correct Answer: 1

Which structure is involve in gaseous exchange of plants

1. stomata
2. lenticels
3. cuticle
4. all of these

✅ Correct Answer: 4

Common feature of human and insect trachea is

1. non-collapsiable wall
2. supporting rings
3. ectodermal origin
4. endodermal origin

✅ Correct Answer: 1

Vomiting occurs due to

1. constipation
2. diarrhoea
3. antiperistalsis
4. peristalsis

✅ Correct Answer: 3

Photosynthetic prokaryotes lack

1. ribosomes
2. chloroplast
3. cell-membrane
4. vacuole

✅ Correct Answer: 2

Which of the following organ is because of absence of teeth in birds

1. crop
2. syrinx
3. stomach
4. gizzard

✅ Correct Answer: 4

The scientific name of jelly fish is

1. Aurelia
2. Madrepore
3. Actinia
4. Obelia

✅ Correct Answer: 1

In which plants leaves are always in whorls

1. lycopsids
2. psilopsids
3. sphenopsids
4. pteropsids

✅ Correct Answer: 3

In bacterial and viral infection, their is increase in number of

1. platelets
2. RBCs
3. antibodies
4. WBCs

✅ Correct Answer: 4

In plants, which are involved in testa formation

1. tracheids
2. sclereids
3. sclerenchyma
4. none of these

✅ Correct Answer: 2

The etiolated plants lack

1. chlorophyll
2. xanthophyll
3. caroteins
4. none of these

✅ Correct Answer: 1