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Cds Journey > Biology > Flashcards

Biology Flashcards

1
Q

What is active transportation?

A

Active transport is the movement of molecules across a membrane, from a region of their lower concentration to a region of their higher concentration, i.e. aganist the diffusion or concentration gradient.

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2
Q

Chlorophyll in photosynthetic prokaryotic bacteria is associated with

A

membranous vesicles

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3
Q

Which of the following organisms is responsible for sleeping- sickness?

A

Trypanosoma

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4
Q

What are smooth muscles?

A

Smooth muscles are involuntary muscles as their functioning cannot be directly controlled by our own will.

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5
Q

Which one of the following cell organelles is known as ‘suicidal bags’ of a cell?

A

Lysosomes

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6
Q

Which one of the following is the correct sequential phase in the successional development of vegetation community in a habitat?

A

Nudation, migration, reaction and stabilisation

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7
Q

Which one of the following acids is also known as vitamin-C?

A

Ascorbic acid

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8
Q

Which one of the following is not
found in animal cells?

A

Cell wall

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9
Q

Which one of the following functions is not carried out by smooth endoplasmic reticulum?

A

Synthesis of protein

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10
Q

Which one of the following cell organelles mainly functions as storehouse of digestive enzymes?

A

Lysosomes

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11
Q

Which one of the following tissues is responsible for increase of girth in the stem of a plant?

A

Lateral meristem

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12
Q

Haemoglobin of RBC can carry
both _______

A

oxygen and carbon dioxide

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13
Q

Urea is produced in ____

A

liver

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14
Q

Which of the following is/are the main absorbing organ/organs of plants?

A

Roots

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15
Q

In which one of the following physiological processes, excess water escapes in the form of droplets from a plant?

A

Guttation

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16
Q

If the xylem of a plant is mechanically blocked, which of the following functions of the plant will be affected?

A

Transport of water and solutes

17
Q

Which one of the following is the special type of milk produced by a lactating mother, essential for the development of immune response of newborn baby in human?

A

Colostrum

18
Q

Which one of the following statements explains higher mutation rate and faster evolution found in RNA virus?

A

RNA is relatively unstable compared
to DNA

19
Q

_______ is a process of progressive accumulation of heavy metals and pesticides in an organism.

A

Bioaccumulation

20
Q

Large fishes of the pond are found to have higher concentration of pesticides than planktons of the same pond. (True or false)

A

True

21
Q

A person may suffer from tuberculosis if she/he frequently visits crowded place.

A

Bacteria of tuberculosis spread through droplets by sneezing or coughing.

22
Q

Which one of the following is a true fish as per the biological system of classification?

A

Flying fish

23
Q

In which one of the following types of connective tissue in animals does fat get stored?

A

Adipocyte

24
Q

Lysosome is formed from which
of the following cell organelles?

A

Golgi bodies

25
Q

A protein is synthesised in the endoplasmic reticulum bound ribosomes and it targets to the inner thylakoid space of chloroplast. How many double-layered membrane layers it has to pass to reach its destination?

A

4

26
Q

What is lymph?

A

lymph is a colourless fluid containing specialised lymphocytes, not RBCs. It circulates throughout the lymphatic system. Lymph is also an important carrier for nutrients, hormones, etc.

27
Q

All amphibians and few reptiles have _____-chambered heart.

A

Three

28
Q

Which one of the following elements is involved in the control of water content of the blood?

A

Potassium

29
Q

Which one of the following elements is essential for the formation of chlorophyll in green plants?

A

Magnesium

30
Q

Which one of the following proteins gives lustrous shiny appearance to silk fibre?

A

Fibrin

31
Q

Blue baby syndrome is caused by
the contamination of

A

Nitrite (NO2−)

32
Q

A biological community in its environment such as a pond, an ocean, a forest, even an aquarium is known as

A

biome

33
Q

The foul smell of urine of a healthy man having healthy food, when spilled on floor, is mainly due to the bacterial decomposition of

A

Urea

34
Q

Which one of the following gases is released mostly from landfills in urban areas?

A

Methane

35
Q

Which one of the following is considered as ‘good cholesterol’ with reference to individuals facing the risk of cardio-vascular diseases and hypertension?

A

High Density Lipoprotein (HDL)

36
Q

Dengue virus is known to cause low platelet count in blood of patient by

A

accumulating platelets in
intestine.

37
Q
A

Cds Journey (4 decks)

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