Which structure(s) of proteins remains(s) intact during denaturation process?
1. Both secondary and tertiary structures
2. Primary structure only
3. Secondary structure only
4. Tertiary structure only
The polymer that is used as a substitute for wool in making commercial fibres is -
1. Melamine
2. Nylon-6, 6
3. Polyacrylonitrile
4. Buna-N
The artificial sweetener stable at cooking temperature that does not provide calories is-
1. Saccharin
2. Aspartame
3. Sucralose
4. Alitame
The liquefied gas that is used in dry cleaning along with a suitable detergent is-
1. Water gas
2. Petroleum gas
3. NO2
4. CO2
Non-membranous nucleoplasmic structures in the nucleus, are the sites for active synthesis of:
| 1. | protein | 2. | mRNA |
| 3. | rRNA | 4. | tRNA |
Which of the following nucleic acids is present in an organism having 70 S ribosomes only?
1. Single-stranded DNA with a protein coat
2. Double-stranded circular naked DNA
3. Double-stranded DNA enclosed in nuclear membrane
4. Double-stranded circular DNA with histone proteins
After meiosis I, the resultant daughter cells have
| 1. | same amount of DNA as in the parent cell in S |
| 2. | twice the amount of DNA in comparison to haploid |
| 3. | same amount of DNA in comparison to haploid gamete |
| 4. | four times the amount of DNA in comparison to haploid gamete |
Which of the following organic compounds is the main constituent of Lecithin?
1. Arachidonic acid
2. Phospholipid
3. Cholesterol
4. Phosphoprotein
The main difference between active and passive transport across cell membrane is :
| 1. | passive transport is non-selective whereas active transport is selective |
| 2. | passive transport requires a concentration gradient across a biological membrane whereas active transport requires energy to move solutes. |
| 3. | passive transport is confined to anionic carrier proteins whereas active transport is confined to cationic channel. |
| 4. | active transport occurs more rapidly than passive |
© 2024 GoodEd Technologies Pvt. Ltd.